I think you are clear after one normal exam. I can't remember if you had an EMG or not, but my mom's emg ended like this. The doctor put down the needle and said, "Has anyone ever said anything to you about ALS...Lou Gehrig's Disease?" My mom NEVER had an exam that ended with the words normal. There was ALWAYS something wrong...even at the beginning. At first they thought it was a mini-stroke. Then it never got better. I took her to the hospital again and the neuro did physical exam and immediately mentioned ALS. You probably have an issue, but it is NOT ALS.