PLEASE HELP:

Okay so... I have ALWAYS had protected sex with my boyfriend and we have just recently started having Sex regularly. We use Trojan condoms with the special tip plus spermicide. Sorry if that's a little tmi lol, anyways . About 2 days ago I started feeling a little uncomfortable and gassy in my stomach. I haven't had gas exactly, I just feel bloated as if I do have gas. Also my breasts are slightly tender, just slightly when I press on them. I can't help but ask, should I be concerned about pregnancy? My next period isn't for 12 days And I really don't want to be freaking out over nothing I'm just very concerned. I'm about to start college and my family would KILL ME if something were to happen. Please help.