"my eyelids are swollen, sometimes itchy and red and my tongue is enlarged and has toothmarks on it."
(STILL a sign of dehydration-you need...)
My gut is screaming:
SALT
You haven't mentioned salt.
When a person goes into a hospital with a sodium deficiency, are you aware they get the equivalent of 2 tablespoons per day (in their IV) until they reach normal levels until they can be released?
AND they get salty-food options for their meals, too. (Which include mucous-producing dairy products etc, but I digress...) - [hospitals - {{{shudder}}}]