Progesterone and Letrozole

Ashley

So my last period was dec 22nd. I had a laparoscopy January 17th. At my follow up appointment my dr prescribed me 10 days of progesterone and then told me to start Letrozole 3 days after my last progesterone pill. Has anyone else done this? I find it odd that he doesn’t want me to wait for a period before starting Letrozole.