Progesterone and length of menstrual cycle

by Anonymous
(Virginia, USA)

This past month I started progesterone therapy (for PMS symptoms) on day #15 until my period started. I would use 1/4 teaspoon (20 mg) of cream twice daily. In checking my cycle, my period shortened by 3 days; I began bleeding on day #25 instead of #28. I quit using the progesterone cream once bleeding started.

I am wondering if it is possible that using the progesterone changed the length of my cycle. I also haven't noticed much of a change in my PMS symptoms since beginning the progesterone cream therapy, but suspect it will take a few months of consistent usage before noticeable results appear.

I am 41 years old, menstruating regularly and am still nursing my baby boy, though will be weaning him soon. I am on 30 mg Armour Thyroid for hypothyroidism, and Wellbutrin XL for depression. Thank you.