Alright calm down my guy you will be healthy
I myself have been twitching everywhere for what like 6 months now I was so scared of ALS at first but I started to do my research. The reason I was scared was because I googled my symptoms and that is something you should never do. Googiling your symptoms WILL kill you so take a break from that. Anyways I realised that the time I started twitching was when I had a blood test and my vitamin levels were low. I am still twitching because my vitamin levels are still very low from my recent blood work. You mentioned you had no weakness, this points away from ALS because the first thing people notice is the weakness not the twitching. Also twitching doesn't mean anything when diagnosing ALS. Its true most people with ALS do twitch but it is just like saying most people with ALS are right handed so please calm down we all are perfectly healthy here
Try magnesium supplements eat more fruits. Heres something to calm you down, Twitching has never been the FIRST symptom of ALS to prove it I challenge you to find a case where it was the FIRST. Also if you are under 18 or under you shouldn't even worry since the only time ALS was diagnosed in that age range is due to a familial history of it. So unless someone in your family has it you are worried for no reason. If someone in your family did have it your chances would still be pretty low, I wouldn't buy a lottery ticket for 2$ each with those chances. Hope this helps remember you are healthy
(Edit) Atrophy which you mentioned cannot be judged by yourself or others only by a doctor
now live on with your healthy life(Edit) Also if you have facial twitching specifically eyelid twitching the twitching as a whole is one hundred percent a vitamin deficiency, Also if you twitch only when in a stationary position where you are not moving such as sitting down or lying down it is one hundred percent anxiety also no need to worry