Ended my normal period 5 days ago.. had minor spotting for days 2,3 and 4 after period and days 4 and 5 had intense cramping really low in the middle ?

Irregular bleeding: 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.

Needs more info.: These symptoms need more information from an examination to give you a complete answer. Go see a GYN MD.