I had sex on january 5th. a week and a half later i had a normal period. now a month later (2-12) my period is extremely light. barely any on the pad. 5 weeks past the date of sex, about 4 past the last period. any ideas on what it could be. i was taking

Take a test : 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.