Have you checked for jaw cavitations through a good surgeon who has a cavitat machine? My digestive problems went away immediately after the surgery. Breathing changes, heart beat changes, etc are all a sign of sepsis in your body (which is what a jaw cavitation is like).
I bet the meridian of your infected tooth/cavitation matches to that of the left leg.
I have pretty much all your symptoms, except "pain in nose and forehead". I also have Lyme, mercury, etc.