I experienced some pretty bad panic attacks several years ago but was prescribed Xanax for it. The side effects were dizziness so I went off of it. My doctor advised that the best way to get through a panic attack is to keep moving and it will work itself out. If you sit and wait for it to pass it seems to make it worse. I know how scary it is when you get the feeling like you can't breathe and something terrible is going to happen. Would you be open to ask your doctor for just a small dose of BuSpar (non-habit forming anxiety medication)? It works pretty well and you won't get addicted to it. I also found out that exercise - even if it is a short walk - works wonders too. Best of luck to you.