Wow!! You just explained a lot of my symptoms! I still have not been fully diagnosed (still have more tests) but, I went to my eye doctor because I've been getting horrible headaches trying to read things. My actual eyeball hurts. Feels like it's straining or working too hard. I had a picture of my eyes taken and it showed optic neuritis in only one eye. I have also been diagnosed with Raynaud's disease. My toes and fingers become either white or blue and the pins and needles feeling is intense. I can the in the air conditioning even on hot days. I have to wear gloves and UGG boots at work during the summer (of course people think I'm insane). My doctor told me if I cut back on caffeine, cigarettes and reduce my stress level I should have less frequent flare ups. My back has been in severe pain for a while now. My legs from the thigh down go numb for 2 hours at a time and feel like they are literally on fire. Same with my arms and when this happens I get a weird twitch in my face. I'm waiting on an MRi of my spine to see if there is anything going on besides my doctors diagnoses of Fibromyalgia. I had an MRI of my brain because ive been very confused lately. (Asking the same questions 2 or 3 times) forgetting what I did only minutes before, driving to work-getting there and not remembering the whole ride there and telling my arm how to write...it's like I have to talk my arm through writing or typing) the MRI came back negative for tumor or lesions. As far as appetite...the smell of food, sight of food, taste of food makes me want to vomit.
I really hope that your doctors figure out what's going on. It is so frustrating to deal with these symptoms and not get an answer as to what's causing it. If you have anxiety or are stressed, I've found doing something to take my mind off it helps a little bit. Good luck when you get some answers I'd love to hear.