Confused

Georgina • My husband and I are trying to conceive baby #1! It`s been a bumpy road so far but we`re hoping for our little miracle.
I went to went to my Doctor in April and found out I have PCOS 😔. He prescribed me metformin and progesterone to which I had a normal menstrual cycle for the month of May but no period in June, up to then I'd been pretty regular. All HPT are negative, so my question is, has this happened to anyone? Did the progesterone effect my menstrual cycle? Why did I skip a period. I'd appreciate any insight you might offer 😊