Feeling this level of constant fear and dread is incredibly draining. Just like you *racjen* I ended up involved with the Crisis Team because I honestly began to feel that death would be better. They were lovely but absolutely helpless to help me because they knew zilch about hormonal mood swings and anxiety.
My story started in the Autumn of 2012, with intermittent and inexplicable dread + depression. Everything else in my life was good. It came and went over the next 2 years, it was a terrifying roller coaster and the dread would descend out of the blue, ruin my life for a week or two, then mysteriously just disappear in a matter of moments.
But in Feb. 2016 it didn't disappear and just stayed and stayed, and I thought I was losing my mind. Had to be signed off work for several months and my poor DH and Mum endlessly sitting with me in what was essentially a suicide watch. Over those horrific months it would very occasionally disappear for a couple of days at most.
This is NOT how 'normal' mental health issues work. In those rare days I didn't just feel better, I felt 100% back to normal and incredulous at how dreadful I had been feeling. This proved to me that it was something chemical buggering about in my head, switching back and forth at will and I was helpless to control it.
As others have said, diet, foods, breathing techniques, counselling, exercise, herbal remedies...NOTHING MADE A SINGLE BIT OF DIFFERENCE. NOTHING.
And, as others have so said the cruelty of this specialised hormonal anxiety is that it 100% tricks you into believing that it will never, ever end. So even when you experience the occasional good few days, the very moment the dread reappears you instantly forget how much better you had just been feeling and are 100% certain that you will never, ever feel anything but fear and dread for the rest of your life.