im 17 and i can only masturbate at night i use a makeup brush and rub it really fast unstill i tense up and get this nice feeling then me legs tremmble and i cant go on anylonger i cant finger myself it feels horrible and when i use my fingers and rub my clit it hurts my hand i wanna orgasm but i dont know is i ever have and what can i uses to make me cum HELP!!!!