Bleeding after sex?? On pill

Me and my boyfriend had sex Friday night, it wasn’t anything hardcore lol. But ever since then I’ve had some brown blood here and there in my panties. It isn’t spotting, but it’s enough that I could potentially bleed through. I’m not having any cramp or anything like that. Ive been on the pill for over 2 years & never am late on it if that has to do with anything. Is this normal?