How can I deal with these nasty Residents?

If this happens again, tell whomever is giving you a problem you want to see the orders that your doctor has written and then you want to know WHY they are questioning those orders. The other thing is - can your doctor arrange for you to have this done at home, by a home care agency, to avoid this scenario? It sounds to me like there is a big, big problem with the residents' attitude toward people who have had gastric byp and then get pregnant. Sort of "Well, she did this to herself, so too bad for her." There may be a HUGE knowledge deficeit on the part of the residents. There are plenty of pregnant women who can't eat and drink enough during pregnancy for various reasons, none of whom have had gastric byp, so they should not treat you any different than them, and respect you. You should also ask to talk with the charge nurse and let her sort things out.