I am 16 years old, and I started my periods when I was around 11 or 12. After having a normal cycle, they eventually stopped happening. This went on for around three/three and a half years, and for the past four months my periods have been regular. I don't bleed heavily, but I still bleed. I never went to the doctor to figure out what was happening due to financial struggles (which are still present) and I was wondering if anyone had a clue as to what could have happened?