I did a search and found that some ciswomen taking progesterone supplements while pregnant are also experiencing excruciating cramps, but again, the cramps seem to be coming from the uterus/ovaries. (I also took these supplements but had no cramps that I can remember...)
Another possibility is that the hormone is affecting your bowels, giving you awful intestinal cramps. But I think you would have noticed your bowel movements change a bit if that were the cause of the cramps. i.e. constipation is a common PMS problem for biological females.