I have never had sex before. I and my boyfriend were playing once, and his penis touched my clit. It lasted for like five minutes and he then pulled away to masturbate and ejaculate. After searching the net, I found out that the liquid was the seminal fluid, because it was clear and sticky. He told me it does not contain sperm, but after some investigations, it does contain sperm. My period is highly irregular and always changes when I switch environments. I was expecting my period on the 25Th, but have not gotten it yet. Had a home pregnancy test and it was negative. I am really worried sick. I even have a Canker sore in my mouth right now. Please advise me on what to do.