Sex with bfriend 19 days before period. sat on wet toilet seat (sperm?) 11 days before period. am now pregnant but how? i have a 28 day cycle. help!

It's a natural!: You may not know this, but unprotected sex with a fertile male is overwhelmingly the most common cause of pregnancy in females. There is no help at this point. Your pregnancy was entirely normal and predictable. If you don't want to be pregnant, you need to use some form of contraception. It's as simple as that.

I am pregnant, how?: There is absolutely no way you got pregnant from a wet toilet seat. It sounds like you were fertile and ovulating when you had sex with your boyfriend. Your obstetrician may be able to help you chart your fertility and teach when you are most likely to be fertile.