On july my bf and I went on a romantic gate away to the woods everything was perfect but we had unprotected sex i took the next choice pill right after we finished even though i knew he didn't come my period started the next month three days later but i havent gotten my period so my guess was my iregular self since i get iregular periods most of the time. Just yesterday I was with him in his house, we were alone and he wanted a quickie and we had it but we only lasted for a little while because he ejaculated and got it out on time. I got scared and asked him if he had came in me and he said no, to take away the nerve i took next choice right after i got home which was an hour later. The thing is that i'm scared of being pregnant because of my period and of yesterday. Does next choice actually work? and also my left side boob had been sore is it because of next choice?