Hi Barnmom22
I'm relieved to hear your fever is down a bit, and that you seem to be getting your medications sorted out. It is difficult sleeping on your back if you are not used to it. I sleep on my front and it's taken me weeks to get any decent sleep, and that's in a recliner. Everything else you describe sounds normal for this early on, in fact ten minutes walking around sounds quite a lot for only a few days post op. Your knee is still a new born baby!
This is the most difficult time, but it will pass, all you need to do at the moment is ice, elevate and rest as much as possible.
Love, Tabby xxx