Just wondering if anyone has had a similar experience.

I am 26 on my 4th cycle of letrozole 7.5mg.

I normally have 26-28 day cycles, however I am curr on cycle day 43 with still no sign of my period. I have done many pregnancy tests all negative :(( my Dr is saying wait and test again on Tuesday, but something doesn’t seem right. Not sure when to start worrying.

Any advice would be amazing :))