question: Hello, I m freaking out, so my boyfriend ended up rubbing his penis on my vagina for a little bit, we were in a saltwater pool, and then we decided to have sex, we got out, dried off, and used a condom, what are the chances of me being pregnant, this was at least 13-18 days ago, and today I began bleeding, it felt like a period, but it doesn t look right, I m afraid it may be implantation bleeding..what do you think? I m guessing I was most likely most fertile when this happened, but not entirely sure, I don t track my full cycle, I just want to know how high the chance is from his pre cum on me in the water, during protected sex he pulled out before he ejaculated and I finished him off manually so his ejaculate definitely never got inside me