I am going through the same fears every morning. hello legs, how are you? Hi left hand, are you Ok? Finergs moving smoothly? Heh, right one, you are NUMB! Holy crap! Aaaah, soft palate - are you in place? ETC. ETC.ETC. I take antianxiety drug, B-vitamines and come and do my stretching and come to work and still fear and still struggle as all of us. So I KNOW how do you feel. And I also know how do my mind can paly bad games with me. I live with deep anxiety disorder for 35 years already (not with BFS) and I know it could be a real disaster interms of physical body things. sudden sharp pains between the ribs. lump in the throat. esophagal pains (really nasty, caused me to go through unpleasent endoscopy diagnostics with no slight sign of damage etc.). dizziness. weakness. obsessive fears and thoughts. emotional instability. panic attack because of stupid movie. etc etc etc. My opinion is your knee really wants your attention, but not your fear. And it need medical attention because, as I told you, it is very vulnerable part of body and you could not even notice how easily it could be damaged. As I see you agree with all suggestions given to you in this tread but they do not bring you to relief. I think, it's because you knee is talknig to you - not about ALS but about some cetrain damage/trauma you have to deal with.And of course you feel weaker. Because fear causes every muscle of your body tense in well known fight or flight reaction. IT IS EXHAUSTING. Your adrenal glands fill your blood with adrenaline. IT IS EXHAUSTING. Your body for sure is really poisoned now with fear chemicals usually intended for quick release, quick work and then elimination, but not when you are under chronic fear press. It's like self-poisoning. Yur body is too busy with removing adrenaline to make you fill happy and healthy as before your fears started.Regarding your fears about young people diagnosed with ALS... As far as I can remember, there was a quote from neurologist here in one of the messages saying that there are certain conditions mimicking ALS in youngsters but they are inherited and very very rare. If no one in your family history had died young of neuro disease, you could be quite easy about this. So do not worry in any case about HORRIBLE DISEASE. think about something more realistic - about medical examination of your knee. if doctors will found trauma or blood vessels problem or nevre entrapment - it is curable. if they will found nothing - it is persumably BFS and you would have to treat it as BFS - with anitanxiety drugs, healthy life, mind therapy and patience.have a good luckYulia