Hi everyone. I saw this thread and I wanted to say hello.
I also suffered from anxiety and panic throughout my 20s, and in my early 30s I had a breakdown, which began with a panic attack that lasted for 3 days straight! It wasn't nice. I had to go on extended sick leave from work and went on anti-depressants and had a lot of therapy. I did get better, and even happy, even though I never thought I would. So maybe that can give you some hope.
Also, I wanted to suggest something that I hadn't seen anyone mention. When I think of my recovery, if I had to chose one thing that helped me the most it was a book. I know it sounds silly, but of everything - counselling, anti-depressants, etc, - this one book made the most difference for me in learning to deal with anxiety. If you haven't read it, I can't recommend it enough. It's by Claire Weekes and called "Self-Help for your Nerves". It was written eons ago, so some of the language is very old-fashioned. However, it was the most soothing, comforting thing I ever encountered and the relief it provided was immense. Basically, she explains the physiology behind anxiety, and uses a gentle tone that helps you give yourself a break from it. She goes through all symptoms, (churning stomach, racing heart, etc), and different types of suffering, (obsession, depression), and gives you very simple ways to soothe yourself.
I know I am gushing, but whenever I think about what she did for me I can't help it. One of my therapists once told me that when you are suffering anxiety, you have to be your own mother and tell yourself 'everything is going to be fine'. As a mother I know how important that is for our dc. But, I found it very difficult to do for myself. Her book is written in that mother's voice, and I think that is why it helped me so much. The other reason why I think this book was so amazing is that while it did not cure me on the spot, (that would have been a miracle), I have never had another panic attack since. Many times, I have felt one "brewing" inside me, but the book taught me how to stop it from spiralling.
I wish I could send you all a copy! (Of course some of you may have already read it, and not thought it helpful at all.. if so, I'm sorry to have gushed ).
I really wish you all the very best today. And sorry this is SO LONG!