she shud take complete rest for few days, i agree with both of them she shud keep her work off for few weeks.
spade gave some very good advice and I second what she said. Your wife really needs to take it easy at this point until she sees her obstetrician. That may mean putting off school and work for a few more days.
Have your wife follow up with her regular doctor as soon as possible - ER doctors aren't specialists so it's important she has a follow up in case there are additional precautions she needs to take. Call the dr as soon as you can.
I am not a doctor but second the ER doctors advice in that she take it very easy until she can see her doctor. Make sure she is drinking enough and refrain from having sex until she has been seen.
If I were in her shoes I would not go back to school or work until had a follow up appointment.