Pregnant or Birth Control?

Cindy

Hi guys. This is my second month on birth control. I’ve had a “period” for three days now. First day, just a little pink. Second day, I wore a tampon bc of swimming and after a few hours, there was a little bit of brown dark blood/discharge. After taking out the tampon, no need to wear anything, a few spots. Now this morning, crystal clear. Could I be pregnant? I’ve also had a problem with eating. Every time I eat, I end up really nauseous and it tastes funny. I do want children. But well, not yet. I’m just tracking my period and all right now. Can someone who has been on birth control with funky periods help me? I just don’t know if I should go buy a pregnancy test! Thank you!