Google autonomic neuropathy . pots syndrome
You can do a trial of transdermal magnesium chloride, every other day, for 3 months.
For optimizing your circulation, you may try Nitric Oxide supplements or Arginine powder.
Do you know exactly why you're on Metoproplol?
Have you ruled out nutritional deficiencies, like Co- Q10, Methylocobalamin B12, Vitamin D, etc.?
Do you know your heart rate increase within 10 minutes of assuming an upright position?
That's a key symptom in POTS and the baseline number is