Hi RangerPaul, I also lost my apetite for several weekx, I looked great everyone thought so. I think it is the strong pain meds. When I started to wean myself off them (Percocets) I started eating more and gained weight (boo-hoo). As I continue the struggle with the withdrawal symptons I eat chocolate, it seems to help a bit. Unfortunately I am gaing more and more weight. Can't fight the food as well as the Percs at the moment, so when I finally get off the pills I will have to tackle the food again!! It never ends!!
Now to your sleep problem, we all seemed to experience this at about 7 weeks or so for a few weeks. I bought a body pillow to drape my operated leg along (guess you could do this with your right one. I also took a herbal type sleeping pill as my OS said the other kind were addictive. I took Sleep MD and they worked really well for me, and I am not a great taker of any herbal pills usually.
Anyway, hope you continue to post and progress better with your right knee. Good luck.