Thanks @JinglingSpringbells. There's no source or reference next to the Louise Newson quote and I can't find any actual studies which seem to support this.
My Mum had her last period at 44, and her mum at 42. Neither of them used HRT and my Gran had severe osteoporosis, so what you are saying about bone protection makes absolute sense.
I do usually have a great diet and generally do lots of exercise, but both these things become really hard to maintain when I have a lot of migraines, it's a bit of a cycle where I'm too unwell to do the things which make me feel better. HRT has been the only thing which has ever stabilised them.
I'm not against using more HRT, I just feel this has progressed so quickly. My periods changed and symptoms initially emerged when I was 36. At 39 they became unmanage and I had a blood test which showed slightly low estrogen and slightly high FSH so I was told I was at the start of peri.
I've been on HRT for 6-months, initially the 50mg patch really helped, then I got a resurgence of symptoms and went up to 75mg after 3-months. Again I was back to feeling great and the migraines and flushes vanished. Now suddenly the symptoms are back after another 3-months, all coinciding with this late period - which seems odd as I'm on cyclical utrogestan, so I thought this would trigger the withdrawal bleed in a predictable way. I assume I must have a really strong cycle still for it to be overriding the HRT like that.
I have this constant niggling doubt that I feel I'm so young to be at this stage and I shouldn't be on HRT, but the hot flushes are undeniable. There's so many of them and I think they trigger the migraines; which are out of control. I keep waking up boiling hot, so the lack of sleep feeds into it all.
I think I'm just concerned if I go up to 100mg patch, I've got nowhere left to go after that and it all seems to be progressing so quickly. The idea that younger women need more, and so I'll be able to go down again at a later point seems reassuring.