Hi ClunpyClaire
Sorry to hear you are feeling rough.
I would suggest that it's almost certainly partly down to your taking the utrogestan daily orally. Even those on cyclical HRT sometimes find that they get a resumption of flushes when on the prog part of the HRT cycle. It seems that in some women progestogens can interfere with the beneficial effects of oestrogen so that higher doses are needed.
In your case have you thought of going on a cycle? Also when I started testosterone after a few months I decided to increase my oestrogen as I didn't want to become to T dominant so that androgenic side effects might override the female ones! (Doc was happy with this) so I now am on 62.5 mcg patch (cut down from 75 mcg). I use much less testosterone gel though.
Are you post-menopausal? I mean blood tests can be helpful but in your position I would consider changing to a cycle ( as long as you have no medical reason why not and can put up with a bleed), increase the oestrogen patch slightly, and maybe reduce the Tostran - but depends how much you are using now. If doc does blood tests hopefully they will also measure T levels. Also have you thought of taking utro vaginally to reduce side effects?
Hurdity x