I have had twitching in my legs at least 50 times a day for five months. i saw a neurologist 2 months ago, and had a clean clinical, but i just can't stop worrying about als. with no progression in five months, can i stop worrying?

ALS typically has muscle weakness, muscle wasting, and twitching. Since the neurologist did not find any serious condition, it is reasonable to consider other causes such as benign fasciculation syndrome (BFS) which is quite common and not associated with any serious neurological condition. Consider a follow up appointment with your neurologist for continued support.

Seriously doubt you possess any fragment of ALS, but you obviously are anxious and fearful. Urge you to seek counseling to learn to control your concerns. Cognitive-behavioral therapy will help greatly.