pregnancy

Opinions please- A couple weeks ago my boyfriend and I had unprotected sex. When he came he pulled out but as he pulled out came all over my vag and I'm not entirely positive that he came in or not. I took a plan b pill not even 7 hours later and was curious what symptons of it? I started birth control last sunday as well and correct me if I'm wrong but with hormones changing your body, can't it make your boobs hurt or swell? I need opinions on what to do!!