Am a 20 year old female who has a problem with periods. My first menstrual period started with a lot of pain and it continued over the years adding vomiting, nausea,dizziness to the list. Then recently I skip per any 3 months and then started again but was light period lasting 3 days. I gained a lot of weight especially around the tummy area. But last month the whole month was on periods. What is the cause or is there something wrong with me?