I just wonder though how does adding more hormones to our system help when we are obviously producing hormones ourselves as I haven't gone through the meno and how do I know that it isn't low progesterone ?
Fair comment.
Yes, we may be producing hormones ourselves, however, the levels are very likely to be reduced the older we get.
There have been studies which examine the link between oestrogen and MS (MS is said to be an autoimmune disease). There seemed to be a very definite link. Enough to convince my GP to give me HRT when I started having MS problems after stopping the pill.
I've not seen anything about the link between progesterone and autoimmune disease, but then again, I wasn't really looking
As you say, best to go and see your GP, it might be useful to have something to hand if the autoimmune stuff kicks off again.