I cant sign into facebook

Question

hi i have tried to sign in to face book my addy is autommaticaly put in for me all i have to do is add my password ..it says wrong password but i no its right it wont allow me to go to my page. i went into tools today under options a freind was on my pc helping me could tht of messed everything up?
also i need to get rid of some nasty photos and i cant seem to find them. ive tried going into my pics they r not there