I had my last period at 29th jan. and we had sex 26 feb.i had bleeding 3 days later.pragnancy test after 16 days later .and its negetive.m i pragnant?

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.