I HAD UNPROTECTED SEX MARCH 24,2013, I TOOK A PREGNANCY TEST APRIL 9,2013 IT CAME BACK NEGATIVE HERE IT IS APRIL 21,2013 & I STILL HAVENT HAD A PERIOD. I HAVE THIS COLD MY NOSE RUNS IM COUGHING & I HAVE A FEVER. WHAT SHOULD I DO????? I DONT RECALL WHEN THE LAST DAY OF MY PERIOD WAS BUT IT EITHER MARCH 4-7.