GREAT news about the EMG results.
... a disc out of whack in your neck is most likely the reason for him to order mri, If this is the cause it would explain a lot of your symptoms, that's for sure. Much can be done now days for disc problems, I went through the epidural series of injections about 5 years ago now, that coupled with physical therapy was very helpful. No one ever mentioned surgery or anything like that for me, and at one time I had a total of 7 herniated discs at the same time, so, due to my own fun and games, I think it is very treatable if this is the cause for your problems.
good luck, let us know what the MRI finds.