I had the same problem and doc said not to have sex for two weeks so that everything can heal of course i had what i can describe as a friction burn on my uterus so be careful and goodluck
I've been told thats normal sometimes you can knock the cervix causing it to bleed. This happened to me around the same time the bleedimg stopped for me within 24 hours. I consulted my midwife she said its completely normal but if the bleeding carries on then maybe call your doctor.