Letrozole and period question

Ashley

Hi!!! I have had normal periods each month since i started Cabergoline . Did first round of Letrozole in February . Haven’t had a period since January 25 did a test on February 27 said negative. Currently 12 days late according to app. Going to test tomorrow but has this happened to anybody? What was the outclme? Is it normal for Letrozole to not give you a period after??