My period is really irregular, to the point where it can start the first of the month to the end of the month. I'm 4 days late on my period. I have been so stressed out about school and life it's killing me. I was supposed to start Sunday and my bf and I had sex Saturday night. And I know sex can push it back. Then on Tuesday night w head sex too. I haven't been getting sick or anything. Just a little sore chest, cramps, going number two a lot (like how I go on my period), I broke out, and I'm bloated. My bf has never came inside of me but I'm worried about Precum...should I try and wait it out? What's my chances of pregnancy?