Hey, I’m currently on birth control but the doctor said

Patient: Hey, I’m currently on birth control but the doctor said if I was active the pill isn’t good. I recently had unprotected sex with my boyfriend right after my period ended. 2 days later I found a small clot of blood on my vagina and I’ve been spotting now and then with cramps. Could you guys possible tell me what’s wrong? Btw excuse the email I’m using my brothers

Doctor: