help?

okay, so. i'm a 16yr. old girl and my 17th birthday is in four months; i recently actually started masturbating. but everytime i do it, i feel like peeing like 3-5 minutes into it, and so i stop. the pleasure becomes too much sometimes as well and one time [[ out of like, five in total, ever 💀 ]] i actually cried; not because of my emotions, but because the feeling [[ pleasure (?) ]] was too much. i really don't know what's wrong with me. if there's anything wrong at all. it does feel good and i wish i coule continue but either i feel like peeing or my legs are shaking hella or i feel tears streak down my face. i haven't done it a lot, at most 6 times if not five, but i haven't ever finished. oh, and i rub my clit; i don't feel too comfortable with inserting my fingers yet. any help would be appreciated. x