Hi Holly! I thought I'd jump into your discussion. I had a left TKR 8 days ago, so I know exactly how you are feeling. It is definitely a scary and stressful thing to go into, but (at least for me) reality has been much better than what I thought it would be.
First, it is great that you are exercising and preparing yourself for recovery. This will definitely be very helpful as you'll need the muscles from your other limbs to pick up the slack from the operated knee. It is also great that you're thinking ahead on what to anticipate. I did that, too, but was worried I wouldn't remember it all. No worries! You can log into BoneSmart each day and reread areas that are applicable to you. It has been a godsend send for me.
Once you get to the hospital all the questions about pain control will be handled for you--but I strongly recommend that you ask your nurse to tell you exactly what you are being given (dosage and frequency). I didn't do this, so I was a little lost. I had very little real pain, however. Uncomfortable when I had to move around, but not pain.
I went home with a prescription for Percocet (Oxycodone-APAP 5/325)--1 to 2 tablets every 4 hours as needed. I have taken 1 every 4 hours, around the clock. I set my bedside alarm clock during the night. I eat a few crackers or other light snack before I take them so I have never felt nauseated. I've started to stretch it out to 5 hours a few times.
Icing-- I use an ice machine or a gel pack every couple of hours. I keep it on for at least an hour.
Elevation-- most of the time my leg is propped up on 3-4 pillows.
I'm not very hungry, but I'm drinking a lot of water, which leads to many trips to the bathroom with my walker. Lots of exercise
The whole experience so far has not been a breeze, but it has been infinitely better than my imagination thought it would be.