270pmol is the very very bottom of the range for a dose of HRT which helps anything at all, Mary - so not surprised you found you needed more.
I went up to 200mcg patches plus 6 pumps of gel, and was at 880pmol. This resulted in a massive improvement in my sleep, to the point where life is liveable (not perfect).
Getting worried that 880pmol was a bit too high, I reduced the gel down to 4 pumps - and kept patches at 200mcg. After a couple of weeks my symptoms started to come back again. Even this weird joint pain in my hands at night. I tested at that dose and I was at 650pmol. But I've now added the extra 2 pumps back in again.
My Newson doctor is fine with me being at 880, she said 'this is within the range we aim for - which is up to 1000pmol, with symptom control'.
Just thought I'd share that, because I see under-treated women everywhere. There is so much fear-mongering about estrogen that many women really aren't given enough estrogen to treat their symptoms and then still end up on all kinds of other meds. If people still have symptoms and are on HRT and they haven't explored the higher doses yet, I'd really encourage them to - you can always come back down again, if it doesn't help - but at least you'll have tried it.