My period has become irregular in last 3-4months. at first i got a really brown period and now just brown spotting. could this be something serious?

Brown blood: is older blood being cleaned from the uterus. In order to determine the cause of the irregularity recommend gynecological evaluation. Take care.

Brown = blood: 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.