Hell Shellb.
Sorry to hear that you are feeling miserable and useless, I am sure you are not but I recognise how horrible this journey can make you feel. I agree with you in that I always think the anxiety is related to other things but you are right, the only reason is hormones (I am using HRT patches but still having problems with anxiety).
I had been period free for three years before using HRT so I am definitely post meno but I'm sure other ladies will be along to answer your question.
Wishing you well and take care.
K.