Hi. Last march 5 My bf and i had sex but we were on our undies. He ejaculated on my butt near my vagina. Could it be possible that sperm got in me bec i was also a bit wet that time. I read somewhere that if our fluids meet then the sperm could find its way inside the vagina. Please help. I'm really scared. My last period was feb 25. I usually have 30-33 days cycle. I'm more than a week late now.