Thanks for the congratulations... but it won't be my child.

I'm already the mother of 3 (ages 6,4, and 2) but this pregnancy will be a surrogate pregnancy. I'm carrying for some friends of mine.
I'm just trying to map out all of my pre-reqs that I have to take before I can apply to the nursing program here, and CNA is one of the pre-reqs. It would fit nicely into my schedule the way I have it mapped out right now, but I would just happen to be in the second trimester of this surro. pregnancy.
So, other than heavy lifting, there's nothing else to worry about? Oh and to clarify I'm not pregnant yet. We are anticipating January or February.