I’m very glad that the EMG was normal and that your neurologist cleared you of ALS or other neurological issues. The cramp-like feelings you describe are in the overwhelming majority of cases caused by benign, easily remedied treatments.
However, I think any responses in this forum should be as accurate as possible, and while this doesn’t apply to you, ALS cramps—which are not at all like you describe and are accompanied by clinical weakness—are exceedingly common, not rare. This from published research done in 2016 from the National Library of Medicine entitled “The Natural History of Muscle Cramps in Amotrophic Lateral Sclerosis.”
”Muscle cramping is a common symptom in amyotrophic lateral sclerosis (ALS)”
“Cramps developed in 95% of patients over the course of their disease.”
According to the research ALS cramping is more intense in the first year of the disease. Again, this is for people with ALS, and your neurologist and the tests should completely reassure you.