Okay, I took one of the at home ovulations kits to find out when I'm ovulating, when I got a test that showed I was ready my husband and I had sex. Now my period is almost a week late, I have taken two pregnancy tests and both have been negative. I heard that for you to ovulate, you have to be having a period that month. I am so confused. My periods aren't irrgular, but no positive test? My periods always arrive on the 28th or 29th. I took the ovulation test that was possitive on the 13th. I just read somewhere that you have to have you period 14 days after you ovulate. It is the 3rd and still no period and no possitive pregnancy test. How long CAN it take to show up on a test? Not all women show up right away, can it take a few more weeks? I had a friend that didn't get a possitive test until she was 7 weeks pregnant.