bleeding after sex

the first time I had sex I didn't bleed, and i've been sexually active for like 6 months at this point and for some reason the last two times i've bled. i'm not on my period and the first time i thought it was weird but it was really really rough so i thought maybe that was it, but it usually is rough, but this most recent time it was slow not so hard, i mean there were a few really rough hits but i wouldn't say it was rough, not compared to the usual just continuous banging. but i bled this time too, not a lot but enough to have to run to the bathroom super fast afterwards to wipe it off or it'll get on my underwear. i'm thinking maybe that it's going too fast and there's not enough foreplay and using lubricated condoms just isn't enough and the excessive friction may be what's wrong but i'm not sure