Could I be infertile?

Ash

I've had my period for 6 years now, and not once have I had a consistent period. Part of this was due to an eating disorder that stopped my period altogether, but I'm eating regularly and have been for a couple years. I'll have a seemingly normal period and not have another for 3 months. I also started my period when I was 9? I think something's weird. Because most people I know have a schedule and normal period. Even my little sister!