Yep, much the same for me. It is actually incredible how many people start off with the weird and wonderful neuro symptoms and head off down the MS route and then take a right turn at ALS a few months later.
Honestly dude don't worry about the twitching...I can sit in the bath and watch my calves going at it like a bag of snakes sometimes but it doesn't even concern me, as for the twitching eyelid which I've had on and off since 2007...ho hum.
Not sure if you have checked out any anxiety forums but I was Pan on anxiety zone a few years back...you can check out my story on there and I bet you every penny you have our stories pretty much mirror each others.
edit: oh yeah, myclonic jerks!? don't talk to me about myclonic jerks.