What might my Dr say/do?

My period was due yesterday, but it still has not started. I took a test yesterday and this morning, and they were negative. I am on my third round of letrozole, so my period should be starting on time. It did the first 2 rounds.

This is supposed to be my last round of letrozole before we reevaluate, if I'm still not pregnant. My Dr wanted me to keep her posted on when my period starts or if I get a positive test. I just messaged her letting her know, no period and negative test. What might she say/do/suggest?

I get really bad anxiety when it comes to waiting for my Dr to respond to messages. Any advice on what to expect would be greatly appreciated.