I had mine a week before Christmas. So I'm coming up to 6 months soon.
Agree sleeping is rough but it will get better. I too had pains but I was given a booklet with lots of answers to problems. I used a pillow to prop me into a good sleeping position.
I iced mine before I went to bed. I used the iced brace they gave me at least 4x a day I did that for about 4 months.
I also got a nerve pain, apparently the nerves are left to find thier own "home" within the knee.
I couldn't even put a sheet near my knee without getting the "electric shock" pain, luckily it was intermittent and only lasted a few days, that was the worse pain for me.
But down the road I'm good now, scar is heading amazingly well only half still Red the rest going white, area still warm so still mending.
I'm now on the list for my Hip replacement, they tell me July /August as I had a wait a good 6 months between x2 major operations.
Looking forward to be fully mobile again.
Don't worry it will be all be great you will get through this, each day it gets better but fully understand the pain.
All this will be part of your life's history in a very short while.
Take care.