What Are The Side Effects Of Masturbation In Women?

hi im just really concern about the bleeding from my vagina after rubbing and playing with it.after about a week of finishing my period i started to rub my vagina outside my nickers going up and down with the side of my palm part thats connected to my thumb and without going into my vagina. i do cum and then go toilet and wipe myself and theres blood.not to much but change at least 2pads in a day and bleeding last for 2days then stop until i rub myself again.help please