You don't need another EMG.
If u had fibrillations and positive sharp waves along with spasticity and hyper reflexes, then I would see why you would want another EMG...
BUT if you have a normal physical, normal reflexes, and a clean EMG, it's virtually impossible to have something bad. I wasted a year of my life worried because of my muscle twitches and although I still have a lil bit to this day, I'm fine.
You have to learn to relax and know you're ok. You had all the necessary tests and passed with flying colors.