When I first started college, I was accepted to the nursing program, but decided to go elsewhere and got a different degree. When DS was first diagnosed, I thought about maybe going back to school and going into something in the medical field, so I could be more flexible should there be more hospitalizations, sick days, appointments... But, for me with the time and money involved and pretty much having to start over with vacations, sick leave and a new payscale, I decided it wasn't for me. Currently I've got excellent benefits, vacation, comp and sick leave saved up and I'm paid fairly well. I have thought should things change, I could look into doing temp work, which is what I started off doing when I finished college.
When DS was first diagnosed and in the NICU for several weeks, I met several nurses and RTs who did chose their field after a child was diagnosed with a disease. And maybe if I lived in a community where it was a little easier to work on a degree, while still working full time, I might have taken that path, but in my area it's pretty much full time, daytime classes & labs for 2-4 years.