29 yrs old period 6 days late always very regular tubal 4 yrs ago using clips negative pt but cramping off and on sometimes very painful, pregnant?

Not likely w tubal: Irregular spotting 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.