"instead" of posting here why dont you try a GYN forum. this forum is for hepatitis. although i pride myself with knowing alot about the vagina i can not help you in this aspect. just a thought why not go on birth control pills? this will stop you from bleeding at all. dont forget, take care of that it can get you many things in life!
Instead if it is a tampon. will not stop you from urinating , A tampon is used to stop bleeding menstural cycle; You must be very young. They are to entirely different openings.