Wow, it sounds like you are doing everything Innerzone. I am so sorry you are having to go through this. I know panic and anxiety sucks.

One of the things that works for me, but you kind of have to have being able to relax established already is to get yourself to relax, like you do for meditation. you cant panic and relax at the same time. I will go thru stages where i go panic, relax,panic relax, panic, relax over and over in a minutes time but eventually i can get the panic to go away.

another thing i do is imagine a meter in my head. and with the panic the needle is measuring up to 10, so i visualize turning the dial down on it to zero with it the anxiety level going down, i do this as many times as i need to for the anxiety to go down.

hang in there and i hope you find some relief.