Worried 😅😅

Okay so I recently started birth control pills about 2-3 weeks ago. Ever since I have started them my stomach feels extremely weird, I bloat really bad(looks like I am pregnant most of the time), and I am nauseous. Im sexually active, but we use condoms, he pulls out, and I take bc pills. I was just wondering if there is still any chance i could be pregnant? Or if all of these crazy side effects are from the pill.