Hello again, Bart. I'm sorry you're feeling so bad. OK--below are answers based entirely on conversations with my neurologist and my neurosurgeon. 1) Yes, clean EMG means no ALS. He said that it can detect the disease in asymptomatic limbs as well. If twitching is present, and it's due to ALS, the EMG would detect it. You've had several, including one, if I remember correctly, about 6 weeks in. Mine was at 2 months; he said if I had it, "this thing would be going crazy."2) Didn't discuss a "time limit" per se; at my second appointment (when he REFUSED to do a second EMG), I mentioned I was coming up on 5 months of twitching. He said by then, I'd have other signs and symptoms that both he and I could detect.3) Didn't discuss this specifically, but see next answer.4) He said they look for weakness, meaning I couldn't resist him trying to push my fingers together or I couldn't keep my leg extended if he pushed down on it. He (and the neurosurgeon and my rehab/physical therapist) have all done strength testing on me. They do NOT push very hard--at least that I can tell. He said in February that I'd be "dragging my foot." So, yes, certainly by your point in this today, you'd have noticeable weakness like dropping things or tripping, not just feel weak. But--weakness can be caused by a host of other things. Foot drop, for example, can be brought on by nerve damage or impingement, not just neuro-muscular diseases. It's serious and needs attention, but it's not fatal.5) We didn't address getting worse, but I, and many here, have gotten far worse before we got better. He did say, again at my second visit, that the twitching itself didn't matter, no matter how much or where. They look for other symptoms; the "company the twitches keep." He said about 15% of the population has benign twitching at some point or another, and the neurosurgeon and physical therapist both said "everyone twitches" at some point. Maybe not like you and me, but you get the point, I hope.6) Didn't discuss this; he sensed I didn't believe him on the second visit and got noticeably short with me, ordering blood tests as an additional data point. All clean. When I returned in April, he smiled and asked if I was still worried about ALS. I said no, but he proceeded to reassure me anyway. I would speculate, however, that if misdiagnosis of BFS was a common or even frequent occurrence, we'd see evidence of that, considering how much many of us here have scoured the internet--which I have stopped doing, BTW. But again, this is NOT from a conversation with the neuro.Bart--go back to your doctor; seek out a good therapist. Listen to the medical professionals, not your fears.Hope you get to feeling better soon.Mark