old blood weeks after period?? (kinda gross)

so lately i’ve been getting some old blood (brown lookin’ stuff) coming out of me. it kinda happens everywhere, when i discharge a little brown stuff come out, when i’m on the toilet some brown stuff comes out. i’ve been off my period for a few weeks, AND my period doesn’t start for 12 more days, nearly two weeks. i’m concerned that I might have an infection or something like that?? i do masturbate, and have a vibrator that I’m able to stick in me. Maybe that’s causing issues? plz help me answer this!!