sir,i had an unprotected sex last month around 2nd april just after the period and after that i hd taken contraceptive pills-unwanted 72 within 72 hours. but later after few weeks i had problem with urine as it was coming with some blood drops and blood clotts,later i went to a doctor and they had taken my urine sample for test and she said i had some infection so she had given some antibiotics and urikind sachet and advice to have plenty of water.but now the problem is that there is one week delay from my periods as it last happened on 27th march and now for today i am having stomach pain and loose motions,and for preventive measures i had taken pregnancy test at the time of visiting my doctor and later on 29th april and it shows negative result....help me asap