Is misdemeanor automatic disqualification for school/work?

I made one stupid mistake as an 18 year old senior in high school and got arrested for petty theft. Now 11 years later, I completed my BA, served several community organizations, became a “productive” citizen, and most importantly never got in trouble again. Now I want to pursue another bachelor’s in nursing. Unfortunately, my record couldn’t be suppressed as a minor because I had just turned 18 three weeks before. My grades are pretty good (3.7 in my first BA, 4.0 in my prereqs) and I have extensive volunteer experience. I’m just really afraid that one mistake will ruin any chances I have of being a nurse. Is an arrest an automatic disqualification? Will any hospital even hire me? Does anyone have any advice on what will happen or what I should do? Should I just give it up? Do I actually stand a chance?