I guess it's simpler to get at what I'm getting at more directly: Look into iodine deficiency, and see if that could be a cause. -Especially- if you have strong negative reactions to high-carbohydrate foods, as reactive hypoglycemia is one of the less common symptoms. (It's one I get, actually, which is why I'm aware of it; white rice knocks me out of commission when I haven't been taking regular iodine supplements.)
I don't have strong negative reactions to high-carbohydrate foods (they sometimes make me tired). The symptoms of iodine deficiency seem pretty severe and inconsistent with my experience.
As I understand it, Lent is a holiday where we celebrate the scientific method by changing exactly one variable in our lives for 40 days. This seems like a convenient Schelling point for rationalists to adopt, so:
What variable are you going to change for the next 40 days?
(I am really annoyed I didn't think of this yesterday.)