Hangoversss?! pregnancyy?!

I was wondering if anyone has gone through anything similar and ended up being pregnant. I had unprotected sex during my fertile window about 13 days ago I had sore breasts a few days after but it kind of went away now there just stayed a little fuller than they were before. I drank last night with some friends and I was on my 3rd beer when I started feeling extremely nauseous which was really weird because I can drink alottt before I even feel anything, I kept drinking and felt okay so I went home and slept. When I woke up I threw up and I have never in my life had a hangover like that. I never puke after, this is a first for me.