I don’t think fluctuations can be stopped Vicky, not whilst you are chopping and changing dose etc.
The only way to know how you truly feel, is to stay one one type of HRT for 3 months or so.
For example, I switched to femeston conti, after lots of bleeding on the patch.
At first I felt great, then slowly by week 10, symptoms were surfacing and my bladder was a mess. I then started the 50 patch, again great at first, but symptoms rearing again.
So, I know that the 75 keeps my most bothersome symptoms at bay, BUT I need a more effective progesterone ( coil in my case)
If i didn’t stick with those Hrt types / doses, I wouldn’t have known they weren’t right for me.