I was due to ovulate on the 17th of January. We had sex the 16th and 17th. My period was due January 31st and it's not here yet (Febuary 2nd). I have taken a few tests, the really cheap strip ones, I bought them online, and they were all negative. I took them every day since the 31st with my first morning pee. I have been crampy since about the 30th and I've been getting horrible heartburn. Is it possible the tests are just not sensitive enough/it's too early/theyre defective? Or do you think I'm not pregnant?
Thank you for any help!