Progesterone suppositories and random spotting

I’m on 100mg of progesterone twice daily. I’ve had three random days over the past week and a half where I’ve had a little bit of colored spotting. One day was a light tan, one day was very light pink and today was more of a brown.

Has anyone had this experience? It’s only after my morning dose and never when I wipe.

Trying not to worry!