0n 4 th june 2017 i got my periods. on 8th i had unprotected sex i took p2 on 10 th .i had bleeding on 17th i expected my peroids on 1st july of which they dd not come .instead i had mild cramping and producing vaginal discharge that smells ver bad .its on24 july and i havenot seen my periods yet.. i do pregnacy test every week and it turns out negative .i have other pregnacy symptoms such sore breast and mild cramps from time to time.wat could b the cause?or am i pregnant