It could be something innocuous like BFS. I empathize with you since I went through basically the same experience with these symptoms. The only way to get peace of mind is to get a 4 limb EMG. In the meantime, there are other possible causes that can be ruled out with a simple blood test (various deficiencies and Lyme can cause similar symptoms). The hardest thing to do is not stress out or focus on the fasciculations because that tends to exacerbate the situation. I have BFS (which can only be diagnosed by ruling everything else out) and it is not fun but knowing that it isn't something worse is important.