Hello, so i’m really scared

anytime i try to masturbate i use either the handle of a hair brush (smooth) or my fingers.

But whenever i do this i start bleeding as if i’m on my period when i’m not and i will bleed heavily for up to days after. This happens even when i’m not on my period (i’m on birth control so my period doesn’t happen until i’m off my pills for a week obviously) and i’m really really scared because the bleeding is even heavier than when i’m on my period. does anyone else experience this or should i be worried? please help!