jmdevans - dude, you are NOT alone. I mean, your post could have come out of MY fingers.
I do the same thing - I tend to "need" communication when I'm having an attack, as though it will somehow focus my mind outwards instead of inwards, or it will help my grip on reality to talk to a real person.
I also feel the same thing - my panic attacks start in my chest or stomach and slowly radiate outward until my whole midsection and chest feel constricted, my heart-type-area hurts, my pulse is too fast and feels weak, and I have a lot of trouble keeping my breathing even close to normal. This makes my wrists and the back of my neck go all tingly, and I start thinking "I'M NOT GETTING ENOUGH OXYGEN TO MY BRAIN!" or "I'M ABOUT TO HAVE A HEART ATTACK!" It's horrible. I freak out and think I'm about to die.
So... I'm still here, and man, I'm sure you're still here too, we aren't about to die, so... here's to that, right? Just know that your symptoms do not isolate you - if anything, know that I relate 100% to them and reading your post / typing this reply has actually really helped me chill this morning (fighting one off myself).