Late period and negative tests

My period is now 7 days late (and I am usually very regular every 28 days). I've taken an excessive amount of tests, all negative. My husband and I know conceiving naturally is unlikely, due to MFI, but we have been tracking ovulation and BD lately just to have some information on file for when we decide to head to the fertility clinic. So, these games my body is playing on me are very not cool! Messing with my emotions and getting my hopes up for nothing 😔