###Human: I am having irregular periods with pain in left side of the body. Please help. ###Assistant: Hello. At this stage, two things are possible. First irregular menses due to the premenopausal syndrome. In this condition due to hormonal dysbalance, patient menses are irregular. It will solve automatically. Second is PCOD. In this case, the patient has increased weight gain and irregular menses. For this, you have to start tablet Metformin 250 mg BD, tablet Progesterone (Meperoate) 10 mg from the 21st day of cycle to 25th day. (Last week of the cycle).