If its caused by the physical condition itself, like thyroid or harmonal then its best to use some form of medication. However being a panic sufferer for many years and not using any medication what so ever- I fought it on my own basically, mind over matter that sort of thing.
There are many forums and many sites about this terrible disorder. I am fine most days and my best advice to you is never avoid things because of fear of an attack. even if you think that you wont make it, you always will. Force yourself to do things as much as possible.
Good luck