Could I possibly be pregnant?

I'm only 16, and thinking that I'm pregnant. I haven't had my period at all in the month of June, and now it's early July. Every time my boyfriend and I had sex, we used protection. I know that it's not 100% protected, but I thought we'd be fine. The time that (if I am pregnant) I think I might have gotten pregnant was on June 19th. We both noticed that it felt different that time, like the condom was covered in something on the outside. I know for a fact that it wasn't from me (sorry for all of these details..). But ever since then I've been having really bad stomach pains like I'm on my period, but I'm not and it's over 2 weeks late. Whenever I stand up I feel like I'm going to pass out, and I feel SUPER hungry but can barely eat every day. I also had this really sharp pain in my side last night and didn't think anything of it, until I read that it could possibly be a sign of pregnancy. I'd like to know if it sounds suspicious or if I just need to not worry about it? What are some other signs of pregnancy?