Have you had your blood sugars checked as a lot of your symptoms sound like what I get like when mine have gone low ( I am a diabetic) - it's always worth getting the basic bloods done if your feel anxious as thyroid , low iron and diabetes amongst other things can give you symptoms of anxiety like shaking, breathlessness, sweating and agitation.
I know what you mean about feeling wired as that is how my anxiety was over Christmas which I am putting down to to a downward shift in my oestrogen levels as I the day sweats took over at that time too. I took a couple of Valium over two days then and that was enough to let me regroup - I'm very reluctant to have them as my mum was hospitalised for withdrawal when I was a teenager because long term use had caused her more problems than the initial anxiety. I think part of your problem is that you have just got into a downward spiral of fear so are expecting to feel shocking as you come off and are scanning yourself for symptoms - we all do that when we are anxious but it is just adding to your anxiety tenfold - if you think back a few weeks , it was all your heart, then your pancreas , and now it's the effects of withdrawal that are consuming your thoughts. There is no easy answer other than to just try and relax and take one minute at a time - it will pass out of your system and then you can see what was the medication and what is you and your thought processes. It is hard and I wish we were all further along the road or recovery than we are, but we have to keep taking tiny steps even when things seem impossible.