My fiancé and I are trying to conceive, we have been using PreSeed lube and ClearBlue ovulation predictor kits as well as tracking everything and doing the deed every single day during the fertile days (and then some). Yesterday was supposed to be the last day of my period, but it still hasn’t come. I’ve taken two pregnancy tests that both came back negative. So I’m pretty sure I’m not pregnant, but if my period is mysteriously absent this month, how do I know when to start trying the OPKs and PreSeed again?