Take a look at those two Amino Acids. L-Tryptophan and L-Tyrosine. They are the building blocks of your chemistry in your brain (aka serotonin, dopamine, noradrenaline, etc.). If these are out of balance, you go from once in a while slightly "uncomfortable" to full blown anxiety attacks. Esp. when you suspect a burn out as well, take a close look at these amino acids. I suggest you hop to health store (i buy mine at the Vitamineshoppe) get those amino's and do some google research. There's a wealth of info about these two amino's and its well worth reading into it. I use both of them and it's magic.
Hope that helps you a bit!