Weird Spotting

May be a little tmi

But I recently just finished masturbating, and I went to go run a shower and I noticed I was lightly bleeding. I wasn’t bleeding before hand, and my period also has already passed. i feel like I’m scaring myself into thinking it’s something else, but what could be causing this random spotting? I didn’t use my fingers, just clitoral stimulation so I don’t think I did anything like scratch myself.