I missed period for 3 months .this month i have period for 2 weeks ..what happen to me? i am very tired .i try to conceive .

Irergular periods : Irregular periods are one of the most common problems obgyns treat. If this is one time problem it usually resolves on its own. If this is a recurring problem you should be evaluated. There are many options available to help regulate the menstrual cycle. If you are trying to conceive the schedule a visit. Schedule a visit to see if you are ovulating. Check a pregnancy test too.

Not ovulating: Seems like you are not ovulating. You should consider discussing this with your gynecologist or see a fertility specialist.