Pippa, as you know I am dealing with the same and you're the only other person I've met who's on 62.5
And just like you, it was one week after I increased the dose that everything went really crazy and I ended up in A&E I was so worried. Things have gotten very slowly better since then (not totally resolved yet) but that might help you some.
I think really you need a blood test to check your levels. Maybe you are absorbing from the patches way better than the Lenzetto and actually have high levels, for eg.
My bloods were only 233nmol on the 50 patch - but retrospectively I should have stuck it out there until these symptoms totally resolved before increasing. And maybe even repeated the bloods in case they were an anomaly and usually higher.
But I didn't realise the symptoms were due to the estrogen at the time so I increased anyway. Now I'm at 62.5, I'm going to give it a full 12 weeks at this dose and see what is happening then. (Now at 6wks.) I am sleeping better. The throbbing is still happening but maybe I am just learning to sleep through it or perhaps the intensity of it is less. It is also coming and going for shorter periods instead of just happening non-stop all night. So since I can see some improvement I have a little bit of hope that it will resolve if I give it another 6wks. If it doesn't resolve, I will have to drop down to 50 - and give that 12 weeks.
I am also going to try a low histamine diet - starting tomorrow - for 2 weeks. My hunch (wild stab in the dark guess really) is that some of us are teetering on being histamine intolerant but usually we are just about okay and our bodies can clear the histamine. When we add in extra estrogen, it tips things over the edge - especially since our bodies aren't used to it - and we produce way too much histamine in response to the estrogen and get histamine intolerance symptoms. So - what we are both experiencing being due to high histamine.
If you want to join me on the low histamine diet trial, I started another thread about it here. And posted some more links about histamine intolerance and how it works, there.