Landau,
What you're describing does not sound anything even remotely like what has happened with me.
And, like others on here, I'm not a doctor, (but I've been to many LOL) so, my advise stands, it sounds like you should see an ENT or an allergist. There is not even any reason at this point to connect what you have going on with swallowing to the muscle problems you're experiencing elsewhere.
Given that you
don't have symptoms that would point toward ALS, your age on top of that, and that ALS is uncommon at any age, it makes sense to see a doctor who specializes in the field where you physically have the trouble at, and go in to your appointment describing what is bothering you with the swallowing, drooling on pillow at night, ~ at least it wasn't a girlfriend or wife's shoulder ;-)..... not lead in with fears of bulbar (or any form) of ALS.
I know I just wrote this recently on this forum, and if you search down through the posts you should see it. But, I 'll say it again. Swallowing difficulties are not considered to point to bulbar onset of ALS, doctors actually look at onset of swallowing issues before speech problems as a way to point
away from ALS and for another cause.
I still think you would benefit from a separate evaluation about your muscle cramps and twitching, and your primary care doctor is a good place to start (ask for a referral to what ever specialty he/she feels could get to the bottom of it).
Good luck to you, and come back and let us know what you found out.