I wish I could give you an answer but all I can suggest is speak to a doctor about new medication (Zoloft?) and hope for the best. I know there are those who say don't allow yourself to rely on drugs and use breathing techniques, etc, but I suspect they've never had panic attacks. It's easy to criticize or give advice from a distance. I wrote this the other day on my blog (but removed it). It might sound familiar:

"I have never read anyone else’s account of a panic attack, so I don’t know if there is a description that can be called typical. But the best way I can describe what happened yesterday is, I felt an immediate, overwhelming need to get away – to get out of the house because the house felt claustrophobic and to get back into the house because the outside felt overwhelming. I literally acted like my dog, walking around in a circle looking for a place to land. What I realized, of course, was that what I was really trying to get away from was not the inside of my house or the outside: what I was really trying to get away from, or who I was trying to get away from, was me. So I found all the sleep aids I could and decided to burn off my panic in a dream."

I hope you're better soon. This is no way to live.

I think tonight sleep aids are going to be a requirement
thank you for writing with your experiences. For some reason when I have panic or anxiety attacks it effects my entire body almost like some great seizure

I have severe anxiety attacks from time to time. I know they're similar but also very different. I've had to reduce my coffee intake. I noticed the more caffeine i had the more likely i was to have an anxiety attack. If you can, go talk to your Dr. just to rule out that there isn't anything physically wrong here. I also take Xanax for my attacks.

i dont have anxiety attacks.. my thing is explote with anyone if im angry!

Maybe you can do things that relaxes you.

My panic attacks have become MUCH less frequent and MUCH milder since I started working out and put on a bit of muscle weight. Now that I'm not super-skinny but more or less fit, they've almost gone away entirely. Which is not to say that I don't still have stress, but it's not the full-blown panic attacks I used to experience.

For stress, the big thing that seems to cut the edge is eating, especially medium-slow burning carbs. Starches like potatoes, whole wheat bread, whatever. I know you've said your stomach is in knots, but in my experience, I just have to force through that and then everything gets better half an hour to an hour later. If it's really difficult, something sugary can give me a moment of calm to un-knot the stomach while being easier to get down. (i.e. sip a soda) But that needs to be followed with some real slow-burning calories after to make it stick, because sugar calories burn off too fast, especially when you're freaking out.

My theory is that many of my panic attacks were triggered by adrenaline release from hunger. This is natural: When you get hungry, your body wants you amped up to find food. Also, adrenaline mediates the body's self-digestion when there's not enough food to supply the energy you need to keep going. So for a couple reasons, hunger triggers adrenaline.

In the long term for preventing panic attacks, weight lifting has been great for me. Having a bit of muscle has done wonders for stabilizing my body chemistry and I can't recommend it highly enough.