Storch, you asked what are the odds of someone 24 having ALS. It is described in the stickies, but in a nutshell.......for someone 30 the odds are 1 in 1,000,000. Now multiply that by 5 because only 20% of PALS have bulbar onset, so we're at 1 in 5,000,000. And the further (younger) you are from 30, even less a chance. I would say your chances are infinitesimal.
My husband has bulbar onset ALS, has for over 3 years now. In the beginning he didn't notice a thing. He was slurring his speech, but it was everyone else who noticed, not him. Do your friends notice you slurring, without you asking them? His jaw was never a problem, still isn't (even though he hasn't spoken or eaten in over two years). It starts out as strictly a tongue problem.
I hope you get to the bottom of your anxiety and depression. You clearly don't have ALS in my opinion (or others on this forum). Please seek professional help so you can enjoy life. Good luck to you!