Hello Dr, I missed my period for 3 months , all pregnancy tests urine and blood tests came back negative . my last period was may 12, 2016 and from Aug 5, 2016 i have brown discharge , only when i go to washroom (only when i wipe it) and with that i have mild and some times severe back and stomach pain, sometimes near naval and sometimes on the left side,i feel bloated and go for urine more frequently than before. I am just stressed what it could be because all the tests are negative. Thank u Aman