I am 6 days late for my period. i 've taken a few different pregnancy tests and they have all been negative. when should i worry and see a doctor. i usually go every 28-30 days and the first day of my last period was aug. 2nd.

One late period: 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. Your tests are negative indicating you are not pregnant. There are many options available to help regulate the menstrual cycle. Schedule a visit.