I got this idea from reading one of pidgeholt084 oneshots. Go check them out cause they are a really good writer. Hope you enjoy!

(Thirds person's POV)

Peter walked into the party. He saw flashing lights and the music was literally vibrating the house. He walked in to see Ned and MJ sitting next to a random girl. She looked like an angel. She had perfect pale skin and wore a short red dress with ruffles at the bottom. She had blue eyes and brown hair. She must've noticed him staring because she looked at him with a smile. Ned said something but Peter couldn't hear him with the music going. Peter froze. She started to walk near him. When she got close enough for her liking she said "come on, join us." It was sweet and before he knew it he was sitting next to him. She said "Hi. My name is Annie. What's yours?" 'Peter. Dummy she can't hear you if you think it.' "Peter." He said. She then looked very uncomfortable and gulped. "Peter, can you come with me?" Annie asked sweetly but looked very guilty. "Yeah, sure. Is everything ok Annie?" Peter asked. "Oh nothing just gonna do you a favor." She said then bit his neck.

(Peters POV)

It hurt real bad. He started to feel his neck trying to heal. She must've noticed because she just bit harder. Then everything went black.

⊙﹏⊙ This Sahra and she is bringing us a time skip.

(Third person's POV)

Peter started to wake up. He looked at his side to see Annie on one side and Ned and MJ on the other one. 'well this is weird'. Peter then started to get up only to feel hungry and dizzy. But the thought of food made him sick. So he just went to what sounded good.
Next thing he knew he was standing next to a dead body with two wholes in their neck. Peter then ran. He freaked out. He ran to the one place he felt he could get help. Avengers Tower. Before he knew it he was in the elevator on his way up to the commons room.
'Ding' the elevator doors opened to reveal a group of scared Avengers. "Help me." Peter said on the verge of tears. Nat looked at Tony and Wanda. They nodded. They came towards Peter quickly. "Stand still don't move no matter what. Ok?" Tony said as he went to get a wash cloth. Peter nodded even though Tony didn't see it. Tony came back with a wash cloth and started to wipe off the blood on Peter. Peter flinched when he reached his neck. Nat saw this and Tony nodded. She looked at Peters neck to see two wholes scabbed over. She looked sadly at Tony and Wanda. They had to watch him carefully now since he already fed. "Pete come sit down and tell us what happened." Tony said. Peter then started to feel an urge to attack one of them but not the three in front of him no the ones behind Tony. Wanda sensed this and grabbed his arms right when he went to attack. Nat got in front of him and Tony went to the others.
"Guys you need to leave now. It is not safe for you guys right now. Go to your rooms what ever just don't be in here or the kitchen." Tony said sternly. No one argued they just got up and went into a different set of rooms. Tony nodded towards Wanda once they left. She let go and Peter came snarling towards Nat. She caught him and guided him towards the couch. "Pete. Pete. Peter!" Nat said. Peter snapped out of the faze and looked at her. He suddenly had a look of fear. "Oh no. No no no. I didn't hurt anyone did I?" He asked clearly worried. "How many times has that happened?" Tony asked. "Twice counting that time." Peter said ashamed. "The first time. Did, you, feed?" Wanda asked scared he'll have to go through the torture they go through. "I don't know. All I know is I blacked out them woke up next to a body with two wholes in her neck not breathing or anything just dead." Peter said sad and guilt in his voice and on his face. "Oh Peter." Nat said then left the room. Tony and Wanda looked mournfully at Peter. Nat came back in with four blood bags handed one to Tony, one to Wanda, and one to Pete. Wanda opened hers and Tony and Nat just waited until Peter opened his but he just looked at it weirdly like he didn't know what to do. Nat mentally slapped herself on her head. Of course he wouldn't know what to do he's new. She went over to Pete and sat down next to him. "Look" she said as she showed what to do. "See now you drink it." She said. He put the straw, that Nat brought him, in his mouth. "Mhmm" Peter moaned. He then quit drinking for a minute to catch some air to see all of them in the room drinking from their bags. Once everyone was done they told Peter what he is. "Pete. You are not human anymore. I know you barely were before but now your not human at all or, probably, spider, don't get your hopes up though. I am sorry but you're a vampire now." Nat explained. "Annie. I shouldn't have gone with her." Peter said under his breath not expecting anyone to hear him say it. "Pete who is Annie?" Wanda asked. "Oh this REALLY pretty girl I met at a party last night." Peter said. "Well now we know turned you. Do you feel comfortable and in control enough to be around the rest of the team?" Tony asked. "I guess how would we know?" Peter asked. "Huh. I never actually thought of that." Tony said. Nat facepalmed and shook her head. "Hold on." Nat sighed. She left the room and this time came back with Steve. Peter felt his throat start to burn and wanted badly to attack but instead he grabbed the half full bag in front of him and drank. Tony frowned at his reaction but realized it was better than him attacking Steve. Steve's eyes widened when he saw Peters reaction. "Oh Pete." Steve said. Peter looked up in more control now that he finished the bag and nodded his head. "It's ok guys just one by one." Nat said. Then one by one they came back in. First Bucky then Sam, then Rhodey, then Bruce, and so on until they all came back in. Nat left to get more bags. "Pete what was that earlier?" Sam asked. "Oh that. Yeah well turns out I got turned into a Vampire last night." Peter said. Nat walked in and put a bag down next to her on the floor. Bruce looked down at the bag then gasped. "Guys what?" "Well since Peter doesn't need blood bags anymore all of them you have stored up well their being used for times like these. That's why mine, Wanda's, and Tony's keep going up missing." Nat said. "Wait you four. Is that why when we eat you metal bottles instead of food?" Sam said putting it all together now. "Yeah." Nat said while sarcastically nodding her head. Peter then started to squirm. "Hungry already. Bruce we'll need to check if he still has his powers cause if so we'll need more bags" Tony said while Nat handed Peter a blood bag. Peter opened and started to drink. The Avengers looked at him then mentally shook. Then before anyone realized Peter was passed out.
Maybe this Vampire thing isn't so bad after all.