This describes my symptoms down to a tee. Apologies for the 1935 language in the full article:
"The symptoms are varied but classical-easy fatigue under mental or physical exertion, rapid exhaustion, excessive sighing, sense of suffocation, various types of chest pain, especially precordial, palpitation, abnormal pulsations, tachycardia, bradycardia, syncopal attacks, headache, tremors, dizziness, visual disturbance, insomnia, and symptoms of various gastro- intestinal neuroses. "
The bolded symptom is something I posted about a month or so back, but no one knew what it was, including the doctors.
Here are some links: