WHOOA - U have certainly not let yourself down!
Anxiety is reactive: flight or fight response, to keep humans safe. Try not to separate psychological from physiological that's a rabbit hole. I had my 1st panic attack at aged 3, suffered intermittently life long turning in the 1990s to being unable to leave the house, unable even to go into our garden

. With support from a loving husband, good GP and appropriate medication we have a life together again. It took 4 months in those dreadful years to begin even considering going out. Whether this was related to peri-menopause I have no idea, hindsight suggests 2 me that it may well have been.
I do wish that medics would prescribe appropriate medications, whilst some anti-depressants may relieve anxiety: Venlafaxine is supposed to help anxiety surgeries: a dedicated pill that gives almost instant relief should be offered: i.e. 4-6 weeks of 'valium' under the supervision of a GP. Gives the sufferer head space as symptoms ease. This was a Life saver for me. Eventually I used 'as necessary', 5mg usually the night prior to an event that I was unable to avoid. Knowing that I could take another 5mg the next day, which I never required.
R U phobic about food? For over 45 years I ate enough to keep me upright, when I look at photos

........

propranolol stopped the nausea which enabled me to develop a healthy eating pattern. [now mid-70s].
R U able to explain exactly how the anxiety affects you? Which is the worst to deal with, depression or anxiety?
4 me it's sudden nausea, my thighs followed by my calves go weak and I hit the floor! I do have an emergency pill to swallow which either enables or sends me to sleep. Relief!
[I have to attend a big funeral next month, so will be using Propranolol in varying degrees to get me through. Suggested by my GP 12 months ago when depression side-lined me = upping my escitalopram and adding the betablocka prior to going away for our wedding celebrations].
Bachs
rescue remedy mouth spray or pastilles may help, I would use the spray and not think whether it was working/not. Exercise supposedly helps some with mental health issues as I suppose it encourages the proper endorphins etc. the humans need, of which we have lacked due to driving everywhere and become sedentary.

.
How is your sleep pattern currently? Do U have a relaxation time, mine is my bubble bath ;-)
In what way didn't the Mirtazapine help, my friend found it really useful when we suffered trauma about 9 years ago.