Bleeding

a few days ago me and my boyfriend just hopped right into sex and it hurt real quick cause I wasn't lubricated enough, I guess, but I knew my vagina tore a little cause this sorta thing happened before and I bled and now I've been bleeding again for the past three days but I'm not sure if it's period blood or actual blood or just spotting cause it doesn't smell and it's really dark and I only go through one pantyliner throughout the whole day. also I'm on the shot!