It is difficult to tell when you are through it if you are taking cyclical HRT because to some extent you are still cycling the hormones - albeit only progesterone - which can mean you experience mood swings, even though oestrogen is constant. I started HRT when I was still peri - but I was late peri so I didn't really notice anything other than feeling better. If I had ovulated while on HRT I didn't notice as my bleeds were always predictable.
Sounds like you have answered your own question really in that you still feel on a roller coaster, and one day you will not feel like this and know that your hormones are generally stable. Can't remember how old you are but you can go onto conti HRT (if you want to and can tolerate progsterone well) at 54 or I think sometimes earlier than this is recommended with some preparations.
Try not to think too much about it and concentrate on the fact that (hopefully) you are feeling better on HRT than you did or would be off it!
Hurdity x
