I feel for anyone who gets panic attacks - unless you've had them nobody knows just hw bad they can get - I used to think I was gonna die with every one I had. I also couldnt swallow - couldnt breathe and it was horrible. My doctor told me to cool my pulse points when an attack was coming on - ice where possible on the wrists worked good - it shocks the system into working again. If theres no ice shove your wrists under a cold running tap for a few minutes. In case of emergency I used to carry a small spray can of water in my bag (Evian sell it or magicool is good). Spray on your face and pulse points and it stops the attack. Good luck and hope you soon get over the attacks xx