I have been on my period for over a month it goes away then comes back right away. what is going on?

Abnormal bleeding: The answer depends on your age, history, exam, labs, imaging, etc. Please see an obgyn who will easily answer your question.

Common problem : 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.