You asked for the odds - 1 in 750. That translates to 0.13%. So about a tenth of a percent. Pretty darn low, right? Yes, it's possible to have a lot of the symptoms and not have it. During my MS fears, I had random numb body parts like my index finger one minute? Tingly ness in my left foot that lasted for days, twitching in the legs feet and arms, lump in the throat, all of it. When my fear transferred to ALS, all of these sensory symptoms went away and all that was left was the twitching muscles and lump in the throat. Look into how somatization works along with the fight or flight system while you're at it, it may comfort you. We can create just about any symptom.