Wow, looks like you have covered most bases doctor-wise and test wise. However, for some to be effective, like chiropractic, it takes more than one visit, it takes your body some time to respond to the new adjustment. They sure help me.
It sounds like some of the your problem is anxiety/stress related, also, possibly diet. Do you have any know food allergies? These can cause the symptoms you mentioned, so can low blood sugar, have you been checked for that. you might want to try a food elimanation diet, meaning start cutting out certain foods one by one and if you start to feel better, then it might be food related.
Oh, and also environmental allergies/chemical allergies, your symptoms really sound like this could be a problem. Have you painted your house lately, put in new carpet, changed detergents or personal products? These can all cause allergies and the exact symptoms you have mentioned.
A vitamin/mineral deficancy can certainly cause all kinds of problems as well, so you may need to take a good, food grade supplement, the synthetic ones are not that great in my opinion, the body can not assimilate them.
Hope this helps some.
Try taking vitamin B12--under your tongue--for a few weeks--see if it helps. You can also get a blood test--see if you're low on B12--you can get a shot of B12 or just keep taking it under you tongue