I have suffered from anxiety and panic for 4 years now but through that time i have found info that really helped me checkout this website:
nicoleinc.panicaway.hop.clickbank.net/?tid=H4LT56V7
Try to remember that your brain controls your body and you are in control of your brain.
If you make a conscious effort to control your thoughts you will find that you can ease your panic and episodes of anxiety.
I wish you the best and know you are not alone.
Think about restricting your diet to all natural foods. Veggies, fruits, meat. No sauces of any kind, no sugar, no caffiene, or anything. 5 days should work to see if you notice a difference. Then you can add things back in slowly but surely to see what is the problem. You have to be extremely strict for the 5 day period. .