Did you fall down in the stairwell or just going down it normally you got injured?

IME -
a good wc atty will be able to point out the false reports & errors by the IME. you may have to help the atty find the mistakes and "lies"
usually get a copy of the reports and make a notation with the correct info.
then give to atty so they see what the issues are.

the tricky part is proving this happened as you say, was there any witnesses?
also proof that any pre existing is now much worse due to injury.

mums the word , don't share anything about this with co workers or management.
follow any restrictions by the dr


like no treatment was needed before this injury
aggravation of fibro due to this injury
aggravation of arthritis etc
- records for past Drs appts & checkups for proof & time line

I wonder if there would be anything worth looking into the erroneous alarm by the hotel/motel? and a wet slippery stairwell?

Maybe a slip & fall suit would be simpler than WC- if the hotel/motel was at all at fault.
perhaps both? I don't know how that all works...