So on Sunday, my boyfriend and I were messing around.. and we were both virgins at that time and at the 'spur of the moment' we decided to have sex.. unprotected.. we know it was a bad idea then and do have contraceptions now, but at that time.. we do not know if I could have gotten pregnant or not.. so we did it twice on Sunday.. the first time, he could have gotten pre- inside of me, but as I read, it should not be anything because pre- does not have sperm, it only carries sperm still in urethra, but he did not masturbate for a while and should be clean, and he also pulled out, but his penis only contracted once, which he said was weird because he said it usually contracts a few time when he comes. Later on in the day, we did it again, and I am pretty sure there is some pre- in me (because we had sex earlier) but he did successfully pull out before ejaculating. My period started two weeks ago, and I have irregular periods. What are my chances of getting pregnant? I am 18 and pretty nervous and worried. Please help if you can, thanks!

Don't believe everything you read. Pre-ejaculate does contain sperm and withdrawal should never be used as the primary method of birth control. I've delivered many babies to parents who used the withdrawal method.

Unfortunately it sounds as though you were near your prime ovulation. You are now playing the waiting game and have to wait to see if your period comes.

Can I take the Plan B(morning after) Pill? Because it's 72 hours after the intercourse. But I'm not sure what it will do to me.

And what are the chances of pregnancy?

You can, but it has to be within the 72 hour window of time. Now, remember that there is no form of contraception that is 100% effective. This includes Plan B.