Period feb14-2014 2wks ltr i strd bld brown blood it's now mrch4 still no period. i have constipation, mild cramping, breast tender & nausea/headache?

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.