7/22 spotting brown&red-pink. 7/27heavier bleeding. off&on now a week or so, very light some days or none at all, or 1 episode of heavy. what's up? thx

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, polyps, fibroids & 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.