What causes big heavy clots during menstrual cycle, headache, nausea, very tired and fatigue, dissiness and 2 menstrual cycles in one month? very very bad menstrual pains

Irregular 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. Infections & hormonal changes can cause spotting. If there is a concern for pregnancy then do a home pregnancy test . There are many options available to help regulate the menstrual cycle. Schedule a visit.