###Human: Why am I having painful irregular periods with heavy bleeding? ###Assistant: Hi. Zovia 1/50E is a high dose of an Estrogen-containing birth pill, though commonly lower dosage of 30/35 is used. Please ensure you do not have high blood pressure, migraine, history of thrombosis, liver disease, undiagnosed vaginal bleeding, etc., when using these. Painful periods have multiple reasons like endometriosis, distorted uterine anatomy, big clots passage due to heavy bleeding. Hips are no reason. A higher dose might increase the problems. As per your weight, you can work out with a lower dosage to prevent your problem of irregular, heavy painful periods. Birth control pills have a good effect on all of your problems. By the way, did your doctor specify, why your menarche was so late?