Pregnant? Or not pregnant?

Soooo, I need some advice. I'm stressed out that I may be pregnant. I've been experiencing tender, and somewhat swollen breasts, and constant nausea for the past week and a half. It's kind of stressful cause sometimes my bc, makes my body think that but then again, me and my bf never use condoms, but he always pulls out. So i guess you could say, I just need some reassurance.