I have pcos n i've been on metformin for about a month now n i have noticed some spotting after sex n some lite bleedin in last 2 days. what going on?

Irregular bleeding is  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.

Answer: If you don't normal ovulate then the metformin may be causing hormone fluctuations that may be causing the bleeding. This may be a good sign. However, need more.