I suffer from severe acid reflux (24/7 burning pain) and I am still waiting on proper treatment but waiting for appointments between GI doctors seems to take an entire life time it seems to get help. In the mean time I have been experiencing severe panic attacks every other day for the last 2 months. If it isn't a panic attack it's a migraine headache. What I usually do is clean, straighten up things, take a very long drive or walk to the post office or store etc. Setting a constructive chore can be extremely helpful. Mowing the lawn, doing dishes, cleaning the house, doing laundry, changing the oil in my car, etc etc. For me, it's like I become super-ADHD and can't sit still or concentrate and try not to freak out. And these disturbing attacks would last for days sometimes and once ended me up in the ER because I completely lost all connection with reality. Recently I discovered that if keep saying to myself that this is just a sensatition, it's going to pass and that it will not kill me it would end quicker (a few hours at most). I would eventually pass out and lay twitching on the bed and try not to give in to the obsessive anxious thoughts that occur with them.
Eventually, what I ended up doing is going to a psychologist and she prescribed me Remeron and Xanax. Both of these help with the problem tremendously (only 1 anxious pre-panic attack so far that never developed full blown and only lasted a minute or two). Xanax can be habit forming but my acid reflux is assuring that it won't. Also, the migraine headaches have disappeared.
I did try Valerian root that I picked up at the Herbal store and that helped me get to sleep on occasion before I got on the meds. Melatonin supplement is another one I tried but felt Valerian Root was a lot more natural feeling and helped calm the nervous system.
Good luck, this is one crazy time for all of us suffering!