Also, I'd like to add.
Serotonin levels can be elevated naturally in the body. This comes from tumors secreting biogenic amines, including Serotonin. This has to be tested for IMO.
Sometimes it comes from a hidden slow growing carcinoid in the GI tract. Sometimes it can come from a lung tumor.
Doctors don't look for this as a primary thing often, especially in a complex case that seems to point elsewhere.
But doing testing on serotonin levels...24 hr urines etc may point to the culprit in your case.
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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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