Thick brown discharge right after intercourse then it stopped.could mean what? nomore b/c pills, and had unprotected sex & i have irregular periods.

Brown = old 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.

D/c after intercours: Sometimes there is bleeding after sex because of activity trauma. But would still be evaluated at doctor/urgent care for vagintis.Would also get urine /blood HCG and if recurs consider sonogram