Birth control and bloating

Hey everyone, I’m 15 and haven’t had my period for three months. I’m getting super bad cramps and old blood is just kind of spotting my underwear but no actual blood. I got some super bad bloating too like if I suck in my stomach it hurts and even when push on my lower abdomen. I have an athletic body so I’m not really used to it, it just feels uncomfortable. My gynecologist sent me to have a blood pregnancy test and I’m not pregnant but it could also be the birth control she has me on it’s a way higher dosage since she found out I’m having sex. I take my pills religiously and this pack has no sugar pills for a pause or anything I just keep continuously taking them. Can someone give me some advice I’m so tired of all this and kinda wanna stop taking the pill now.