Help letrozole ladies , is this normal!?

Jasmin • 29. Wifey. Mama🤱🏾 05.30.2023, 11.12.2020👼 MB 🇨🇦

I am taking dose 3/5 of letrozole today. I started cramping lots this afternoon and having brown spotting.

Is this normal or should I contact my RE? I go for my midcycle us on CD12 ( Tuesday).