What HRT are you taking and what dose? As far as we know there is no evidence that we need extra progesterone after the menopause because it is still being made by your adrenals (I think!), and is only needed at high levels during ovulation, conception and pregnancy. When you say full hysterectomy do you mean with ovary removal? It may be that you need testosterone rather than progesterone as production of this reduces after ovary removal.
Progesterone has a sedative effect - it's part of its function - and some women seem to like this when they take Utrogestan (bio-identical progesterone) as part of HRT. Most of us though - hate it - as it seems to interfere with the beneficial effects of oestrogen for many of us and generally dulls the senses!
There is information about this here (scroll down for info about T):
http://www.menopausematters.co.uk/aftermeno.phpand testosterone here:
http://www.menopausematters.co.uk/testosterone.phpIs there any pattern to your anxiety? Is there anything in your life which may be causing it? Have you tried other techniques to deal with it - nomorepanic, mindfulness, various coping strategies that have been posted about on here, and books too have been recommended?
Hurdity x