I have some similar symptoms as you jfit. I have muscle cramps in legs, left is worse, and constantly feel creepy crawly kind of feelings in left leg. Left leg feels weak when I walk. Both arms tire very easily, but so far my manual dexterity hasn't changed (and I pray it doesn't). I get burning and cramping in triceps and biceps, but not at same time. All this started out of the blue in January with joint pain and burning in calves and forearms. I am praying that this isn't ALS, but contrary to what some people on this forum have said to me, I find it hard to believe that it isn't ALS, and if it is it is moving quickly. Not sure if you can typically have progression like this in just 2 months, but something is going on. I have never felt ill before for so long. In my line of work (I am a dental hygienist), I used to be able to keep arms up for entire duration of patient's appointment. Now I find they tire just after cleaning a couple of teeth, or folding laundry, dressing my daughter, etc.. My MRI appt is next week and I am sure it will be normal as ALS doesn't show up on an MRI, and my Neurologist appt is in 2 weeks. I like you am soooooo scared and cry whenever I look at my girls (just don't let them see that). Take care and I hope for the best for both of us, that there is some other cause for our symptoms.