10baggers - My brother in-law, a very strong man physically, mentally, & energetically, went though what you described & vanished within about a year or so after being diagnosed with GBM.
The very first sign of noticing there was something wrong with him was when he was struggling to replace his camera's battery during a x-mass family gathering & asked me to do it for him.
It was a rapid downhill from then on & he had to leave with big chunk of his skull removed because of the surgery until he died a month or after the next X-mass!
Hope people would at least show some compassion & realize the fact that what with project reflect back on us!!
Very long NWBO!!