Help!
I'm 18, and though I've had my period for 5 or 6 years, it has always been irregular. I figured it would "straighten" itself out after a few years, and eventually became a little more normal.
But this last month it hasn't gone away. I don't remember the exact day it started, but I know it has lasted for more than 3 weeks, and its really starting to freak me out a little. It is very heavy.
I'm going to a doctor before I go off to school in 3 weeks, so I've been putting off going to my GYN earlier.

Does anyone know what could cause this type of menstrual problems, and what can I do?