hi, i had sex with my boyfriend on april 1, 2017. i havent had sex since then. on april 26, 2017, i took the urine test in the hospital and it turned out negative. i have had hpts before that, and they were all negative. my last period was on february 18, 2017. it has been 75 days already since my last period. its may 4, 2017 already. i am having milky white discharges and back pain. could the urine test in the laboratory be wrong? am i pregnant? pls help