So, I've had sex with a guy and we used spermicide condoms. We did a second time with out a condom (after he came the first time with the condom) but he didn't cum at all. Lately I've been really stressed out about being possibly pregnant. And my period should be around this time. (It doesn't come on a specific day). But, should I be worried?.. I also have been very gassy and have lost my apitite. Please ask if you need any more info on any symptoms I've probably been having.