I am wondering if anyone else has had this happen......my doc prescribed me letrozole earlier this year and I took it for 3 rounds. I didn't get pregnant but I did get my period after each round. I took some time off. In November, I got my period and took the letrozole as directed. According to glow, my period was due Dec 16. I am now 7 days late. I have not yet taken a test because I am nervous and scared. But I want to know if anyone has ever taken letrozole and didn't get a period or pregnant??