EXCESSIVE BLEEDING AFTER SEX

The last three times after sex I’ve had excessive bleeding on my underwear and when I wipe! It doesn’t hurt but it’s a significant amount of blood, almost like a light period (but it’s not my period)! And it’s not just immediately after sex I still have some bleeding through the day when I wipe! I lost my virginity recently and I didn’t even bleed when I lost it! Does anyone know what it could be?