OP, I'm in the same boat.
Anxiety for years and meds for many of them. Came off them 3 years ago when my circumstances changed and I felt that I could cope. Slowly but surely the anxiety had crept back, little by little to the point now where I just can't cope anymore and I'm going back to the Dr tomorrow to request more meds.
I totally understand and relate to how you are feeling. Living in a constant state of fear, uncertainty, constantly scanning for threats, catastrophising everything, second guessing everything you do, worrying about every decision and outcome... it's the pits.
Then there's the times when it turns into full panic - can't sleep, can't eat, can't concentrate, feel like you're going to explode, sweating, feeling sick, diarrhoea, shaking, trembling, constant racing heart rate, metallic taste in your mouth, tingling hands and feet, butterflies, loose teeth, bleeding gums, hair falling out....
Been there, got the t-shirt and have a first class ticket there again right now as I type this.
You are not alone.
I have to disagree about facing triggers - this isn't always possible or helpful in my experience. iI's fine for some things, but it's no use if you have no control over a situation that could materially impact your life, or depends on the actions of other people - a court case, a job interview, a health problem, a horrible boss in a job you're trapped in etc.
Sometimes its having a coping strategy to deal with the things that are out of your control that is important.
Sadly, in my experience, I can, very occasionally mentally fight my way out of a thinking pattern, but most of the time cannot and just go round and round in circles.
I find therapy and counselling moderately helpful for very mild situations, but when it gets to the point where you just want to die and for it all to be over, where you can barely string a sentence together and haven't slept for 3 days straight or eaten anything and have nothing left inside to either poo out of vomit up, therapy just doesn't cut it.
"Try reading a book"..... good luck with that.
If I could even hold a book steady enough to be able to read it that would be a massive improvement. Then the ability to read more than one line at a time without having to go over and over and over the same line before I can focus enough to take it in, or focus through the tears.
In those situations, only prescribed medicines work for me. I've tried to fix it alone with the power of my mind but have realised I can't - no more than a diabetic can will themselves to produce more insulin.
You are absolutely not alone and there is no shame whatsoever asking for medical help. It's what sick people need.