I'm sorry you're going through all this. I've never had a panic attack but can relate to general anxiety.
I don't blame you for not being eager to take meds. There are lots of alternative treatments for anxiety that would be worth looking into.
Here are some good articles on treating anxiety with supplements such as amino acids, vitamins and minerals and herbs:
http://www.naturalnews.com/028452_an...c_attacks.html
http://www.naturalnews.com/031034_ma...m_anxiety.html An easy way to get magnesium into your system without it causing the laxative effect is to soak in a tub of epsom salt that is magnesium sulfate.
http://www.naturalnews.com/035751_an...al_health.html This is a link to a presentation on curing anxiety naturally.
http://www.painstresscenter.com/The-...uctinfo/AEBK2/ This is a book by a doctor who suffered from panic attacks and anxiety, and overcame it using amino acids and other nutrients. I have 2 of her other books, and have found them extremely helpful.