I am an OR nurse and when I had my first son, I mistakenly thought I would be able to work right up until I delivered without any problem. About a month before he was due, I was so tired, just wanted to be in long cases, sick of running around in heavy lead or running out of the rooms that had cement cases, C arms, etc. I tried to change my leave date but I had already committed to stay until I delivered and my OB could not give me a letter stating that I had to be put on bedrest. So it sucked. I worked right up until the weekend before I had him. If you can get off, I think you should do it. Just relax, sleep and nest.