Freedomfrog,
I had many of the same symtoms, but after I described them to my Dr. He said he thought it was my blood sugar. So the next time it started, I had my glucose tablets handy. I put 2 in my mouth, sat down, and I could feel myself becoming normal again. Just for the heck of it, would you get some tablets, they cost a couple of dollars and put them in your purse. Get a flavor you like. Some have a sweet-tart candy taste.