Welcome Yod,
I had a somewhat similar experience as yours after 5 days of induction chemo in 2009. I was hospitalized, and in an acute care facility for 6 months as a result of chemo side effects, 2 months were in ICU, ventilator, paralyzed, over 110lbs lost, etc. I didn't go on do any radiation until over a year later, and like you, I had to learn to walk again. 5 years later, I overcame most the problems, gained back 50 lbs, eating everything by mouth, minus my current teeth and trismus trouble, but am far better than I was back then. I have a smile on my face when I see the hoyer lift, and wheelchair.
Good luck with your continued recovery.