Hi Gilla, sorry to hear this, and can totally relate. I've experienced similar kind of situation. Started HRT a year ago, 1 pump Estrogel and 200mg Utro cyclically. At this time I still had rather regular periods, except for 3 months break during previous summer. HRT worked pretty quickly and my hot flushes and insomnia disappeared within a few weeks. All was great until March this year, when I had a sudden worsening of symptoms a few days after I had my period. Things have not been the same afterwards and I'm still in process of finding the new balance.
My own explanation for this is that during the time of worsening symptoms, my own hormones declined in the background but not in a stable way, rather with lots of fluctuation. Due to the declining but fluctuating levels its been so difficult to find a balance and I often feel that oestrogen is either high, or low, though I'm keeping the dose steady. To add to that, I've also had issues of absorbing transdermal too quickly which hasn't helped (and which is why I may give Lenzetto a try next).
As you are peri and still have your own cycle, could it also be that your own hormones are starting to decline/fluctuate more in the background and due to this, the previous dose of Lenzetto is no longer working the same way?
Unfortunately I haven't found a miracle cure for the sleep issue as I'm pretty much on the same boat as you. Sleeping has been one of the main issues for me during recent months. I've had already some good periods, like a week ago when I had 7 consecutive nights of good sleep which was amazing. But during the past couple of nights, I've been again waking up at 2/3/4 which is horrible, so I can totally relate to your experience.
Tips you might want to try: valerian root (sometimes, though not always, helps me getting back to sleep), magnesium, restorative yoga (this helps me a lot to calm down mind and body), hot bath in the evening with lavender to relax. None of these unfortunately can fix the hormonal insomnia what you and I have -but I've found sometimes even marginal benefit is valuable.
Good that you will get the blood test results soon and will discuss with doctor to find a solution!
Hope you'll get some sleep this evening & get better soon! Keep us posted! xxx