Are you saying you weigh more than you should for your height? It's possible you have Polycystic Ovary Syndrome (PCOS) which is associated with an irregular menstrual cycle and missed periods (typically 4 or fewer per year).
PCOS is a metabolic disorder of insulin resistance and some of the common traits are being overweight or tendency to gain easily, excess body and facial hair, oily and/or acne-prone skin, and oftentimes cystic ovaries.