My periods started at age 14 and became irregular around age 15. At age 16, I was told that I had ovarian cysts and was prescribed medicines to regulate my periods. I was also given another large pink-colored tablet, but I don’t remember its name. After taking the medicines, I experienced sudden weight gain. I later consulted another doctor who said the previous medicine dosage may not have been appropriate. PCOD/PCOS was never confirmed. My periods are still very irregular—sometimes I don’t get them for around 3 months and sometimes up to 9 months. I want to know the possible cause and what tests or evaluation I need.