Rest and relaxation?

Today is day 3 of only being a part-time employee at work. It's just temporary (and doctor ordered) but it's strange. On Monday, I worked five hours instead of my doctor-ordered four, and yesterday, I actually had to get up and leave when I hit four, leaving work still to be done.
The biggest reason for the change is so I can get more rest. The contractions last week were likely my body's way of saying slow down. With the bigger baby and the huge fibroid, my doctor was afraid that my body wouldn't be able to keep up. She's probably right.
The last few days (and only working part-time) I've still felt like I've hit a wall. Yesterday, around 3 p.m., I started watching the clock...and thinking about a nap.
While sleep has been harder to come by at night, but rest has been harder to come by during the day, too. I've had to make a constant effort to take it easy.
This is going to take some getting used to.