Hey KP-- If you can manage to go and enjoy your life without worrying yourself sick--then, by all means--do that. It would be my top suggestion.
If you are going to drive yourself crazy worrying--then get the EMG done so you can quit worrying. You're a firefighter, as I said, I used to be an EMT/Firefighter. With my level of disability and weakness, I could no way possibly do the job anymore. I gave up my EMT license 3 years ago when I first started to get so sick.
Having your friend diagnosed is bound to bother you--it would anyone. I honestly wasn't being snide with my 'weak' comment. I've complained of weakness for quite a while myself--it wasn't until I found that I could no longer do simple things like open a jar, push a spray can, close a patio door--it's not just hard for me--I can't do it at all anymore.
To be honest with you--I'm glad I didn't go pursue a diagnosed earlier than I have--I'm 50 now, and started having issues with my health about 10 years ago. For me, my neuro is just very suspicious of ALS. I might not have it--but if I do--I'm glad I didn't know it a year ago--or two years ago when the muscle weakness and atrophy got really bad. I had two years to think it was something simple with my neck. I don't have the luxury of living in denial anymore, as the neuro has put it on the table and totally ruled out MY self-diagnosis on what it was--cervical spine and lumbar spine issues or pinched nerves in my arms/wrists. I even insisted on an MRI of my neck and back to be sure it wasn't that.
Best wishes and feel better.