Is it possible to be allergic/intolerant to all sugars and sweeteners?

No matter what it is, sucrose, fructose, glucose, lactose, sugar alcohols, sweetener (aspartame or other based), I get thick, sticky saliva and a sore head. If I persist I get disoriented and need to sleep. It's as if I'm allergic to sweetness.

Thanks in advance for any answers.
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