Spotting on letrozole- 10dpiui

Jul • 👶🏼 👶🏼💙💙

I am 10dpiui and have been experiencing cramping for the past day and now just started spotting. My period is not due until Monday or Tuesday. Has anyone had this happen after

IUI

or taking letrozole? I never spot and my period is never early 😐 thank you!