Hey, I've Been Worried Recently About Something That Has Been

Hey, I've been worried recently about something that has been coming and disappearing for about a year.

When I wipe, the entire toilet paper is black with slight bits of red blood.
I've not had a period for 5 months, and I'm definitely not pregnant (Virgin)

Help? It usually comes for a day every few months then goes but now it's been 2 weeks