s not because of anxiety
a pheochromocytoma seems ruled out because your BP dropped with the
clonidine, but adrenalin seems possibly ruled
in, for the same reason
btw, giving gender, height, weight, age, etc can be helpful for anyone posing a question. also any drugs being taken, and any medical conditions such as diabetes etc
so what can provoke adrenalin besides emotions/anxiety? I don't know, but how's your blood glucose? do you ever have reactive or fasting hypoglycemia?