Hellppp

So I've been having unprotected sex and not on birth control for 5 months with my boyfriend. I just got off my period last Tuesday, but it only lasted 3 days and was light. I recently started having a white/creamy sticky like discharge randomly. Idk if it is a sign of pregnancy or what. Also I have been craving chocolate for a week now and I usually hate chocolate. I'm 17 and I'm freaking out, what do I do???