Okay, so I'm 14 and I started getting my period in December 2008. The dates were the following so far: December 6-12, none in January, February 1-7, March 6-12, none in April, May 6-12.
So, I'm assuming that my period isn't due until about June 6. However, lately I have been having really bad mood swings. I get pretty miserable. Plus, I got a little bit of a back ache a couple days ago. What is going on? Please help.