I messed around with this guy, but we did not have sex. However, I do believe he tried to have sex with me, and his penis was definitely near my vagina. However, he did not ejaculate. It has been 3 weeks and I missed my period (which was supposed to come on the 25th) I have been freaking out, and I am wondering if this has been delaying my cycle even further. Is there a possibility that this encounter could have gotten me pregnant? I have heard things about pre-cum being very strong.

I don't have any symptoms, except today my breasts feel a little bit swollen, but not sore. They usually get larger before my period anyway. How long does it take for symptoms such as nausea occur? Can anyone help me out?