Hi, I'm 19. I haven't been consistent with my period I usually get it 2 or maybe 3 times a year. I am slighty over weight, I experience head aches, abdominal pain, fatigue and back pain. I can't be pregnant because I haven't had intercorse in a while. What's wrong with me?

This might be something you would want to talk to your doctor about. Ask for a complete blood test including thyroid levels.

It is hard to suggest things and we don't really diagnose here.