In 2013 I had a bout of optic neuritis as confirmed by visual field test. I lost three quarters of the sight in my right eye over the course of a morning. It eventually returned about five days later. Once I finally saw an optical neurologist my vision had returned and I chalked it up to stress. I was offered an MRI and dismissed it because I honestly thought the ON was just a fluke thing. I'm regretting that now.
In the last year I've had on and off episodes of intense eye pain. And whenever this flares up I also experience phantom smells ( like car exhaust), a feeling like a lump in my throat (causes continual throat clearing) and a scalp that feels like it's badly bruised. I also experience slight pain in my arms and hands.
On only one occasion, right before falling asleep, I had crazy trembling of my whole body. It was like shivering that I couldn't stop. I wasn't cold, though.
I'm trying not to freak myself out and Google is not my friend.

I'll also admit that while I'm concerned I'm afraid to know, too.
So, could you fine people weigh in, please? It would be much appreciated.