I've had many an argument with my Endo on that subject. Sadly, the VA, like all government agencies, is at least five years behind the rest of the world. They were following the prescribing protocol from 2017 which excludes progesterone. I sent her links to dozens of studies showing the benefits and she responded that the studies were too small to be significant. I asked her point-blank if the fact that transgenders only make up 1% of the population does that mean we are insignificant? Medical journals in China and India dating back thousands of years describe a particular medicine. U.S. FDA: "There is no evidence that this works. The FDA has not evaluated this statement". Sheesh!
That Endo retired from the VA, so I was moved to a Community provider who prescribed progesterone. My sleep patterns improved immediately. Now the VA has decided they want to handle all medical in-house if available. Without warning, they refused to renew my authorization to continue seeing my endocrinologist and set me up to begin care with an in-house Gynecologist. I meet her on Monday (26th).
I worry that as an employee of the VA, she will be forced to follow outdated protocol. However, she just returned from a two-year hiatus traveling in Europe to study Transgender Medicine. So I am hopeful.
I worry that you take the meds "on and off". I don't believe you are doing harm, but meds have a half-life, (amount of time it takes for the body to process them). The prescribing schedule is so that your body maintains an even dose instead of roller-coasting up and down between doses. Oral estradiol has a half-life of 12 hours, so it is usually prescribed so you take one in the morning, and one in the evening to maintain levels. I don't know what the half-life is for progesterone. My concern is not that you are doing something dangerous, but that you might be wasting the medication by not allowing it to work as intended. Feel free to tell me to mind my own business.