I am 24 year old female. My height is 4'10" inches. My weight is 52 kg. From past 2-3 months I am getting irregular periods. On 1st day of my periods I always get painful cramps and rest four days condition become normal. But on my last periods the pain was severe and it was constant on 4th day also. And from someday I felt pain in stomach in normal days also. My belly is increased and weight is gaining day by day. Please suggest me the solution. And why this happening to me.