I am 24 newly married i have been having irregular periods for a long time 3 months after marriage it was regular,but now its been flowing for 3 weeks?

Irregular period: You have a history of irregular periods , followed by 3 months of regular periods and now bleeding for 3 weeks. You should be evaluated by a gynecologist to stop the bleeding. Moving forward, sounds like you may have gone back to having irregular periods. If you and your husband are not planning on conceiving right away, your cycles could be regulated with birth control pills or Nuvaring.