Hi jojo999, sorry you're having such a hard time. Like you I had a sudden menopause, from chemotherapy rather than surgery, and have struggled with awful anxiety and depression since then. I'm still trying to get to grips with the right balance and frequency of utrogestan - when I first went onto HRT about a year ago my estrogen level was pretty much zero; not surprisingly I had a really bad time with any progesterone I tried because there was nothing there to oppose it.
I'm now on Evorel 100 patches (equivalent to 4 pumps of oestrogel I think) and my estrogen level was around 1000 pmol last time it was checked a few weeks ago. I reckon I need this level of estrogen to feel OK, it has really helped with the depression, and I'm sure I remember reading on here that Prof Studd thinks some women do need at least this level to feel OK emotionally. The problem is still the progesterone. Like you I can't tolerate a continuous regime of 100mg a day, it makes me feel depressed, tearful, exhausted and gives me terrible stomach ache. However, as my estrogen level has risen I've realised that I can tolerate a certain amount and that if I can get the balance right it may actually be beneficial.
So I've been experimenting - the private specialist I saw a few times said the minimum you can get away with is 100mg for 10 days every month, or 200mg for 10 days every 3 months. Tried the 3 month one and there's no way I can tolerate 10 days at 200mg - awful. The last couple of months I've made it through 10 days at 100mg and it's been OK - for the first 5 days I actually felt better, much less anxious, slept better, eating better. Then around day 6 the depression kicks in and it all goes pear-shaped. This month I cheated and slapped on an extra half patch to counter the bad effects and it definitely helped. But now I'm in the horrible withdrawal phase and feeling crap, also anxiety level rising again.
Once I've had the bleed from this one I've decided I'm going to try taking it continuously, but 100mg every other day, to see if getting a stable lower level in my bloodstream will actually help. It's so annoying that progesterone seems to be doled out on a one-size-fits all basis, so you can't lower the dose even if you need to. Oh and by the way, I also use Utrogestan vaginally, far fewer side effects and you should be able to get away with using less that way.
You haven't mentioned the possibility of a Mirena - that's another thing I'm holding in reserve for if this doesn't work. Is that an option for you? Also I'd leave the testosterone for now - although with no ovaries your level is probably (like mine) non-existent, I think it makes sense to sort one thing out at a time, otherwise you end up in a right mess. I've tried testosterone and unfortunately it just made me very depressed, not what it's meant to do but this HRT thing is so unpredictable it's not true.
Good luck!