I've had my period for almost 4 weeks?

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 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.

Irregular Menses: It is common for young women to have irregular menstrual cycles: have their periods last longer, come late or miss them all together. However, a period that is lasting for almost four weeks can lead to anemia (low blood count) and should be evaluated by a clinician. This can be due to a hormone imbalance, and easily treated.