I had unprotected sex last June 14 then i got my period the day after we had sex which is June 15 2nd week of the month but i usually have my period on the 3rd week or 4th week of the month then i had my period again on July 2nd week and now this month (August) i missed my period im 2 weeks late. Im having a spotting or brown discharge instead of period. HELP. Am I pregnant?