I've had my period for about 1 and 1/2 months. its been light. im wondering what could be the problem?

See your doctor: The normal menstrual cycle varies in length from 21 to about 35 days, and last on average 3 to 5 days - over ten days of bleeding is clearly abnormal. You may have a problem such as infection, polyps, adenomyosis, fibroids, neoplasia, etc. After 1 and 1/2 months of bleeding, you should see your gynecologist for evaluation and treatment.