Okay so I'm 13, and I got my period for the first time August 5th. Its been completley regular, until now. It has skipped two times in a row. It might have to do with my weight loss, or diet change, but I've been eating healthy. I do excersise but I wouldn't say alllot, or is it because I've only had my period a few times. Just wanted to verify, because I'm a little worried,