Late period. Negative test!!

Jameson

I have been 28 days to the day before my miscarriage in august and right after for the last 5 months. This is the first month we have tried again and I am 5 days late! I have taken multiple tests and they are all negative! I am frustrated and annoyed! Drs office said it could be my cycle changing but I find it ironic that it would change the one month we decide to try! Anyone else experience this???