My mom had ALS and I have MS. She never had numb or tingling feelings with her ALS, only weakness and atrophy. She also had constant twitches that we could see, but she couldn't feel it. With my MS, I get numb and tingly HOWEVER that doesn't mean you have MS. MANY things can cause that ie: pinched nerve, etc... ALS is rare. Don't worry. The stress can trigger more symptoms. Waiting for your appointment won't delay anything. Good luck, I'm sure your ok.
PS. I've found myself in some embarrasing situations due to drinking. Most of us have.