I agree with all that has been replied. I am one who has struggled 22+ years and it took them 17 years to get the diagnosis correct. I think that might have played a roll in me still being able to walk very short distances. I didn't accept getting weaker as an option and tried harder to fight whatever was happening to my body. Yes I fell and injured myself more times then I can count, but I did all I could to keep my life moving. Now, I am only 55 and am just this past couple years been needing a pwc. As well as a stair lift since 2011. Falls on the stairs are not only painful, but dangerous even more so then regular falls, iMO.
That all said, keep on finding yourself things to do to keep yourself occupied and productive. This will help you use what you have plus feel good about your accomplishments. I know that an occasional feelings of being blue or weary can hit with this disease, but pushing through and adjusting quickly to losses to keep busy, helps me to overcome. Although a cruise to someplace tropical turns my blues around too. I am definitely needing one about now!
Hang in there Jerry.