I got my period two weeks early, last month was a week early and the month before it was a week late, its a brown mucous? why?

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 concerned for pregnancy then do a home pregnancy test . There are options available to regulate the menstrual cycle. The discharge needs a separate evaluation.