Good to hear that you're gaining ground on your health issues.
Blood pressure dropping when you stand is a classic symptom of adrenal problems, specifically low cortisol. Mainstream medicine overlooks the endocrine system as the cause of much of what ails us. Your adrenal glands produce 150+ hormones, and control blood pressure, insulin resistance, cholesterol, mineral balance and much more. Why they're pretty much ignored by the mainstream baffles the **** out of me.
There is a simple and inexpensive test to check your cortisol -
http://www.amazon.com/AM-Cortisol-Ho.../dp/B004BT8FGC
Be well.