Your pov:
Dean's been gone for a whole day now and I'm worried sick I've called and texted him endlessly. I'm worried sick!

"I'm sure he's fine (Y/n) relax," Sam said.

"Relax?!Relax Samuel Winchester have you lost your ever-loving mind?! I know we got into it before he left but he usually comes back!"

"I know this doesn't seem good but we've been through a lot lately you know that."

"I know and I am worried about him too. Do not stress out. Dean's a grown ass man. He went out to get a few drinks and is most likely passed out in the Impala. He'll call if something big happens. Ok?"

I sighed and took a deep breath."ok."

"Need a hug?"

"Yes, I really do."

He hugged me tightly and I smiled.

"Nothing like a moose hug," I said smiling

He released me and smiled.

Sam's phone went off. "I'll take this you go fix yourself something to eat you must've worried yourself to hunger"

My stomach growled.
"I hate it when you're right," I say walking off.

I dig in the fridge and find Sam's grilled chicken salad it looked good. Then I saw Dean's pie....... 

payback's a bitch Dean payback's a bitch. 

I grab the pie and a fork.

"Mine now," I say digging in.

"Look Dean just called I'm gonna go meet him at the waffle joint."

"I'm coming!"

"No no no, stay eat, relax. I'll bring him back so you can fuss him out without the public humiliation."

"Fine, bring back my favorite."

"Gotcha."
Sam leaves a few hours later. The door opens and I saw Dean.

"Dean!!" I jumped into his arms and kissed him.

"Wow! Um who are you?"

I laughed. "Dean quit playing you couldn't have gotten that drunk that you've forgotten me. Forgetting me is like forgetting Sam." I say kissing his cheek.

"I'm sorry I don't know you. Did I meet you at the bar too?"

"Dean you're kidding please don't tell me you've forgotten your own Fiancé."

Dean looked at me with shock.

"I'm sorry what?" Dean said.

"Yes, your fiancé," I say

"Not to mention carrier of your child," Sam said.

"Hold up an asshole like I got with a model like her?! I understand the bimbo at the bar but her?!"

"Hold up what?!" I said.

"So um you might want to sit down." Sam said.

"Sam don't Dr.Phil me right now just tell me what the hell happened last night."

"Dean got drunk-" Sam starter

"-And I rode a mechanical bull and I was awesome at it,"Dean said smiling. I shot him a look that could kill Lucifer himself. He cleared his throat and looked down.

"-And ended up maybe sleeping with one of the servers...He chased a witch and the witch cast a memory loss spell which gives us our current situation.."

"Not only do you leave me worried sick but you decide to cheat on me just a few days before our wedding?! Way to go Winchester." I said walking off.

" Wait (y/n)," Sam said following me.

"Sam don't, just don't I need time to process all of this." I go to what used to be me and Dean's hotel room.

After the whole predicament is over...

I chose to stay away from Dean during all this...But Sam kept me updated.
I was pacing the floor until I was too nauseous to stand and sat on the edge of the bed.
The fact that Dean had cheated has completely become my last worry. I didn't care about that anymore I just wanted him back with me safe.

"My name is Dean Winchester, and I am the biggest asshat in the world for cheating on you and forgetting about you (Y/n) (L/n) the most amazing thing that has ever happened in my shitstain of a life." He said falling in front of me. "I'm sorry, for everything if I could take it all back I would." He cried.  I've never seen Dean cry.ever.

"And our baby...I'm sorry I freaked out when you told me last night. I don't want to get rid of it. We're gonna fix all this mess around us and figure out how to give this little one a stable life." He said rubbing my belly.

"For-"

"Dean just shut the hell up and kiss me," I say.

He smiled and kissed me sweetly he picked me up and laid me on the bed.

"I can't believe this is happening even after i screwed up."

"I love you."

"I love you too, Don't tell Sam you saw me cry."

I giggled. "I won't if you give me a foot massage when we get back to the bunker."

" Princess....I'll give a foot massage every day for the next nine months." He said turning the lamp off and cuddled next to me.

"You are the best, By the way I ate your pie."

"......You're lucky I love you."

I giggled.