You have a clean EMG with no weakness. Why on earth would you think you have ALS? Is it the muscle twitching? My muscles are twitching as I write this. I'm not worried in the least, because everyone on the planet twitches. I get muscle cramps, too, and they can happen for a gazillion reasons (most of the time it's dehydration . . . drink more water). As far as your MRI: if your neuro's aren't concerned, why would you be concerned? They're the ones who went to school for many, many, many years and then did their residency and are experienced in those things medicine. You have done none of that. Be done with this and get-on with your life.