For me, the physical symptoms are definitely the worst - I feel your pain, and I think a lot of others do too *hugs*
I get quite a few physical symptoms, like hyperventilating, feeling sick, feeling dizzy, heart beating really fast, head rushing, sweating, blushing... but the worst for me is that I suddenly - for basically no reason - will need to use the bathroom (for either one, or both, of the two things). And if I don't get to it induces or worsens a panic attack.
I'm not coping excellently with it, but having some tablets on hand at all times for preventing diarrhea reassures me a little - it's not good to take them too often, because that's an avoidance behaviour, but having them helps me. As for the other thing, I try not to drink too much before a class, car/train/bus journey or anything like that, and take regular bathroom breaks.
For everything else I find that deep breathing, having some tea (or cold water if I can't have tea), going for a walk outside and just normal painkillers seem to help. Talking to someone about how I'm feeling also sometimes makes me feel a little better.
Stay strong, and remember that while the physical symptoms are really happening to you and are scary/a pain, you can prevent them in future, and deal with them when they happen. You've got this x