I've never experienced this before but I had sex with my partner last night and felt slight cramping after. We had sex again this morning and since every time I wipe after the toilet there is blood on the tissue. I'm 4 days until ovulation so no where near my period. I am 14 months postpartum and at my last smear the nurse did notice some slight erosion on my cervix. But that was not long after giving birth and I've not had bleeding until now. This is the first time it's happened.