Oh my goodness - you are so so close!
With regard to beds that are kind to hips - before my THR in 2017, we upgraded from a conventional mattress with a memory foam topper to a thick latex mattress on an adjustable frame - heaven! Latex isn't as "squishy" as memory foam, which helped getting out, and raising the head of the bed helped even more. Very comfy during the first few weeks, when I spent a lot of time in bed with the head and foot elevated. Don't know if a latex topper would be any better than memory foam, tho. Personal preference? BTW, Valentine's Day is coming up - maybe ask for an early present?
May you have such a good medical team, good drugs and good support that along with your own good attitude, you won't even need good luck on Wednesday!