I just went back to your original symptom list.
Seems you have several symptoms of chronic pancreatitis.
fast heart rate
pain in the mid back
nausea
bloating
weight loss
blood sugar abnormalities (feeling cold etc)
http://www.webmd.com/digestive-disor...s-pancreatitis
Since many of your initial symptoms remain and are gastrointestinal, I'd focus on that. Treatment is usually dietary, by avoiding alcohol, and avoiding a high fat intake.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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