Why are my periods so light/irregular?

Every women who has periods would love to go through what your going through.....little periods.....little pain! There's probably nothing wrong with you since your still a teenager. If you exercise alot then that could be something to do with it. If you eat healthy, that could be a cause. If you want to have regular periods......i would suggest to go on the pill. It's probably just a phase your going through. And as for conceiving? Im sure you'll have no problem!