Trying to get a diagnosis

I have been having symptoms of what I believe to be optic neuritis, on and off, for 3 years. I have suddenly began having terrible numbness in my hands, especially while sleeping. My arms feel weak, as well as my legs. When resting my leg muscles twitch, constantly, and HORRIBLE calf cramps in my sleep. I have a very intense tingling sensation in my back. It occurs almost daily, sometimes lasting hours. It occurs in the exact same spot, every time. My face also weirdly flushes at the same time every day. It’s so strange. I went to the doc and he originally told me that he suspected lupus…. Because of the flushing. However, blood work came back normal. I went to the eye doctor, multiple times. My vision at times is so bad, I can’t even read the word Stop on a stop sign. They finally gave some sort of test, which I failed. The eye doctor sent me for an MRI of my brain, however, it came back normal as well. I know SOMETHING is wrong, I just don’t know what it is. I would like to know everyone else’s symptoms and if you had trouble getting a diagnosis. Thanks in advance!