Nurses have to deal with a LOT of non-tzniut stuff. (Doctors, PAs, paramedics, too — I’ve personally had to teach future doctors about sexually transmitted diseases.) Medical careers are not for people who can’t deal with suffering, sickness, or bodily fluids. Or with some of the seamy side of human activity, which causes some of the things medical professionals have to deal with. Nursing is not for the prissy. And the work is very hard, often under very difficult conditions.
But the reward can be tremendous. You would be helping to save lives which is one of the greatest of all mitzvot.
Good luck!