Had spotting a week before my period,started on time & normal to light 1 day w/o bleeding. cramping has not stopped since my period ended?

Exclude pregnancy: Perform a home pregnancy test. If positive see your GYN. If negative you may give it a few days before seeing GYN

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.