I am having brown spotting after 15days of my periods..my periods last for three days.and my flow is scanty.is getting spotting after 15days is normal?

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 repeat a home pregnancy test . There are many options available to help regulate the menstrual cycle. Schedule a visit.