My daughter is on bed rest at 29 weeks with twins, and I'm trying to help set up the nursery. We feel lost about what to put on/in the be for safety reasons. Does she need mattress pads on top of the waterproof mattress. We had gotten a couple of used ones, but they don't seem to go under far enough--certainly not the 2 inches all around that sheets are supposed to. Also, she has an Ultimate Crib Sheet and it seems like a good idea, but it doesn't fit under at all and seems like a baby could maybe scrunch under the side. One more question--what about the rectangular or square waterproof pads that I used to routinely put under the baby? Thanks for your help. Seems like a lot has changed since I had babies--and we are bewildered as to the safest way to make the bed.

SuEarl