First of all, do you think he mant that nursing is a demanding, stressful, physical job, and people who engage int hose kinds of activities are more likely to experience complications? I've never heard that nursing specifically was an influencing factor.
We have a lot of L&D nurses here who might be able to weigh in on the pregnancy (sorry, I work NICU as well, so I know about what happens afterwards!). You might want to post in the OB-GYN forum as well. That forum stays pretty active.
I could be totally off the planet here, but I'm wondering if she might not be developing pre-eclampsia? With higher blood pressures, the HR would be tachy. Or it could just be stress, or it could simply be that each and every pregnancy is different- unfortunately, just because the first birth was smooth sailing doesn't mean the subsequent ones will be.
I'll be thinking about ya'll...please keep those appointments with the docs and let us know how it turns out.
Ps. When your wife is feeling better, send her over to the NICU forum! We would love to meet her.
Okay, O wise L&D'ers...let's hear it.