Sleep

I don't get it. I've been having trouble sleeping at night due to the pain in my leg. I'm not supposed to sleep on my left side. Normally, I sleep in a combination-my right side, stomach, left side. When I'm not falling asleep, I generally switch from right to left side and vice versa. Now I can't do that. The weird thing is when it's time to wake up, I don't want to. It's as if I've finally gotten comfortable and it's not a problem to sleep. What's also weird is that I don't have any trouble when I take a nap. I can't wait until I can sleep normally again.