i had sex w/ this guy, unprotected, (on the 22nd) and before he came he pulled out but obviously that's not an affective birth control method so i took a plan b the next day and i'm still worried. i occasionally get acid reflux, my boobs are really really hurting and i'm getting super bad cramps. like what is the possibility of me getting pregnant? and what should i do because i know i wouldn't want it.