Wow. I've got a similar thing going on. I wasn't pregnant when I was hired for a July start date, but now I am! DH and I are very excited,

but I'm unsure if I should say anything or not to management.
Before I knew I was pregnant (but when we were TTC) I called HR and asked what the policy was for maternity leave - they said if I've been working there less than a year then their "unwritten policy" is to hold the job for up to 8 weeks as long as I give them a return date in writing.
I've heard that as a pregnant nurse there are certain patients you need to avoid, certain meds you can't touch, etc.... it makes me wonder if I should tell the manager and tell her that I intend to come back to work right after baby is born...
I dunno....