Thread: Period NOT stopping...

The past two times I have had a period, they have lasted for more than a month. The first time was at the beginning of July, and my period lasted until the middle of August. The next period I had started at the end of September and hasn't stopped yet. Before this, my periods had been steadily getting longer...for example, all of my periods in the year previous were anywhere up to 2 1/2 weeks long. The periods are usually not very heavy, although in the middle of October, for about a week my period was so heavy I used a whole box of tampons in that week, and on one of the days, I was changing my tampon every hour or two...
I am 17, and I have been having a period since I was 9 years old. I am not sexually active. I'm not very stressed, so I don't think that would be a factor. I'm not having any bad cramps or anything, although I do have a sort of dull, mostly constant cramp...it's not really pain, it's more like it's sore.
I have an appointment with a gyno but due to conflicting schedules, that appointment isn't until December...does anyone have any ideas in the meantime?