Hi PollyH
Sorry to hear you are having problems.
Blood tests are unreliable but if you have several close together it can build up a better picture I understand. I presume you are in UK and that this was a standard NHS blood test?
There are two different units of measurement for oestradiol - in UK it's usually pmol/l but best to check which yours were. This would be a low reading if so, but if measured in pg/ml then that reading is fine. Here are the references ranges (scroll down to the table)
http://en.wikipedia.org/wiki/EstradiolBest to go on symptoms anyway. I would continue with the 75 mcg for a while - if you have only been on them for a month. Hopefully your levels will stabilise. It's difficult to predict how each woman will react to changing from tablets to patches. Generally patches give a more consistent dose if applied correctly. How often do you change them? Try every 3 1/2 days, and are they stuck down well? I have never had a problem with them and have only ever been on 50 mcg (now age 61 and probably about 7 years post-menopausal).
It's not a question of some women not needing oestrogen - all women become deficient in oestrogen (primarily (o)estradiol) following menopause. However some women do not experience obvious troublesome symptoms,or they are fewer than others. Nevertheless the deficiency affects everyone - because oestrogen has so many roles in our bodies. Fatter women have more estrone (stored in fat cells) - but this isn't a reason to be overweight!
If you used utrogestan vaginally then you could probably get away with a lower dose or slightly shorter course (unofficially) - but your GP probably won't be happy with this, due to risk of endometrial thickening.
Hope this helps!
Hurdity x