Hi Miranda-lady

Just to emphasise that if you are peri-menopausal then as Mary G says as well as your specialist - your oestrogen levels will be fluctuating and are likely to be very high around ovulation irrespective of the oestrogen dose you are using.
So I'm not clear what oestrogen dose and delivery method are you are taking/using - are you saying you are on higher than 100 mcg or are hoping to do so? If so what specifically are you hoping to achieve ie what symptoms do you want to alleviate? As you've already been told, during peri-menopause the fluctuations will add to your symptom burden though the added oestrogen is designed to cushion the blow from the oestrogen crashes. I'm also confused because you mentioned decreasing by one pump (ie gel) and then also you mention 100 mcg which is from patches?? Can you clarify please?
Also when you say you've had to take 300 mg progesterone - is this due to bleeding problems or simply due to the high oestrogen dose? Again it's tricky if you are peri. Can you tell us how long you've been on HRT and what your periods were doing in the months leading up to starting HRT - if you had them - this will give an indication of where you are in menopause.
Finally re scans. Ideally of course they should be available on NHS but they are not expensive (relatively speaking - though I realise not affordable for some). Yes they willl be if you have them done through your private specialist, but you don't need to. There is an organisation called "ultrasound direct" (easily found by googling) that will do basic scans very cheaply (and also do other investigations for menopausal women - which cost more) - started off for pre-natal baby scans.
They do a basic endometrial scan which is actually for fertility but I assume you can ask for this even if not for fertility - the website seems to have changed since I last had one. These are £90 but they do a post-menopausal scan which looks at other things which is a post-menpausal pelvic scan and that is expensive - it's £195. I don't like talking about pricing stuff because I realise it's out of reach of many but as you mentioned scans, thought I would say you don't have to pay a fortune....
Glad the testosterone is helping...
Hope this helps also

Hurdity x