Bleeding during masturbation?

I was using my hairbrush handle as a dildo, and when I finish I noticed on the hairbrush handle there was like thick-consistency almost jelly-like blood that was mixed with discharge, so it was kind of pink-ish in color. I've never had this happen before, after many times of using a hairbrush handle as a dildo lol. Fairly enough, this time I was going pretty fast and hard, but I felt no pain at all. I think I would have felt it if something tore or scratched me. My period was over on July 16th, so I know it wasn't a result of that. Any guesses?