Period 8 1/2 weeks late

I’m 43 and my period is 8 1/2 weeks late. I have 2 small uterine fibroids, Dr. says labs are normal and that I was not in Menopause. FSH was 10.8

Does anyone have any ideas as to what other reasons would be causing a missed period? Dr wants to try Provera , but I’m waiting to see what my body does on it’s own.