Just a quick note to say hi and that I have suffered the same affects as you have from eating at a Chinese restaurant or buffet. I finally figured out that it WAS the MSG. Now I ask if they use MSG in any of their cooking or on the buffet and avoid places that do. In this day and age I'm still not sure why Chinese restaurants continue to use this chemical when so many people obviously have trouble with it. I understand that certain amounts of it exist naturally in food but to add lots more seems ridiculous to me.
Most people complain of headaches but for me it has always been rapid heartbeat following a big Chinese meal out. Avoid MSG and I think you will see a difference for sure.