Sharp cramping heavy bleeding dark red blood large blood clots for four days after spotting for 3 weeks. doc told me last week i have a cyst. ?

Common complaint: 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 for cycle regulation. Most ovarian cysts resolve on their own