Congratulations!! First babies are so exciting!
I worked my full nine months (Or 8 1/2 as the case may be
IMHO - you're already through the hard part. Nothing like working in your first trimester when the meal trays come around.
Make way for the puking pregnant chick!!
I puked in trash cans, in bathrooms, heck... I even puked in a patient's room once. (He threw up first!!
Work as long as you are comfortable working. If you have a limited amount of time off for FMLA or whatever, I would suggest keeping as much of it available for after the baby is born. Sometimes that's not possible, but it's nice if you can. They are only that small once. Enjoy it!
The most important thing is not to set your expectations too high. Each pregnancy is different and you can't compare yourself with anyone. You may have a different experience next time.