HELP LOCKED MYSELF OUT OF MY ROOM?

I can't unscrew any screws because there aren't any! I don't want to kick down the door YET! and I don't know how to pick a lock because it is harder than it seems plus I don't have the right tools! I can't go through a window! I can't use the credit card trick!!!!! and I am not going to call a locksmith.. WHAT DO I DO!!