Mountaindewed,
Would it be possible to fix yourself some light soups/ broths, to keep you hydrated, and keep your electrolytes up, 'til you see the doc? Low-sodium choices are best, if possible. Also, juices that contain Vitamin C.
I'm not a physician, but you might have a sinus infection. Low energy, no energy, icky mucous, sore throat, no appetite, headaches, body aches---all very familiar to me.
Whatever it is, I hope you'll be alright.
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I'm doing well. Making some progress on the home office. It feels great.