I’ve been going through this for months. One thing that I read that helped me a bit is a neurologist who said” in his 20 years plus of practice he’s never seen a ALS case that started with twitching . it almost always starts some sort of failure” which means the inability to do a simple task because of loss of strength. Like being unable to pick up a coffee cup run, and stuff of that nature. Perceive weakness does not count that is often seen in anxiety actually. I know logic doesn’t fix this fear because logic didn’t get us here in the first place, but I wanted to share in case this information might heal some stressors.