It sounds like your nervous system is just replete to me. I also sort of vibrated with the pins and needles when going through the time you are going through right now, It was nasty and made me very very upset. I also was sent all over for tests ; hearing , ecg's, cat scans etc.NOTHING came back NOTHING.Dont let that make you feel bad , you are not a nutter of strange ,just suffering and want some relief. The gp's have to make sure they are not missing any physiological reason then they can elimenate and treat you correctly.
Your body & mind just wants some deep deep relaxation. I think the fact that you are in this cycle of panic plus investigation of possible other reasons , its not allowing your mind to rest from it at all , it almost puts you on limbo waiting to hear each outcome. Im no way medical or trained , but I bet you all your symptoms and physical pains and discomfort are physical manifestations of the mental panic anxiety cycle.
I really feel for you I so do, I suffer anxiety and imediately have a physical discomfort. Its not a good place to be , but the panic attack reaction can be worked on to stop , it will take time , I wont kid you , but this feeling if you start to work on the suggestion will help you. IM not saying it will stop anxiety , as that takes more delving , but you can help yourself get away from the panic attack reaction. I know that at the moment your just wanting anyone and anything to help NOW.
Have you thought about a few massages done may be once a week. Go for more a holisitc practinioner rather than a beauty treatment one, as they will be more trained on mind body spirit. This will at least give some respite from the tenseness you feel and the more you have it the more the relaxation learnt will acumulate and show you you can relax.
I got my mind over mood book , and have started looking at it each night now.
I also had diazepam , took it for 5 days after the 1st week of severe severe panic attacks. Knocked me sideways,I felt like I was walking and talking through toffee, but stopped the panic attacks for a short while so I could at least sleep. Dont worry they wont black you out totally , I still had to get up for wee !!!They are designed to slow down the bodies nervous system and therefore pause the panic. They are only a VERY VERY short term thing.
I hope Im helping and not bombarding you xx