Hi Crispychick, to answer your question yes, absolutely. I've asked myself this so many times, because I've felt so incredibly ill and unwell so many times, and especially over the past almost 3 years, which is when my symptoms worsened a lot. It came to a point where the rarity was to feel well, to feel like before all this started.
My symptoms were many, many, many... too many to list here. The scariest ones being a variety of heart palpitations, dizziness, internal shaking/vibration, tingling hands and feet which become legs and arms and eventually total numbness, and a feeling of being poisoned as well at my worst, a difficult to describe feeling but horrible, which fortunately didn't happen all the time though often enough to make me feel I was dying. I've never had a hot flash however. Of course I've been to many doctors and had all kinds of testing done to rule out other problems (I thought I had a serious illness of some kind).
So I started my HRT journey in April last year and symptoms have improved but not disappeared just yet, I think it's because I still need to find my dose, so that's what I'm working on, unfortunately I have to go slowly because I happen to be very sensitive to any hormones.
Some days I feel almost normal again, some days not so much, and then there's 2 or 3 days a month or so where I feel just absolutely awful and I can barely function (like yesterday, for example, I had all my symptoms all day plus terrible nausea in the evening, which thankfully ended up going away after 2 sprays of Lenzetto). But for now I can't say I'm back to feeling well again, not even most of the time.
I think I'm still perimenopausal (age 52), at least I was last year before I began HRT. My FSH is quite high at 44 but I'd say I must be in the last throes of peri, and I'm guessing that's why my estrogen must be doing really huge ups and downs, hence some of the very bad and very good days? I don't know. I find this to be really difficult to navigate to be honest.
Anyway I hope this is helpful, you're definitely not alone in this.