I need help

I am an LPN in the state of nevada where health care standards are very low, I had an unremarkable record for the last 10 years in the field, recently I made a documentation error I recivied the lowest form of disipline, but the fact remains ill need to disclose this to every potential employer for the rest of my life. So is it even worth it to try to get a job? and how many employers actually hire people that have disiplinary action? and if I do get happen to get a job am I always going to have to take the worst positions out there? Why are nurses the only proffession that the first time you a little mistake that endangered no one, your condemed for the rest of your life? I feel im young enough to start looking for some way to go into something different I am 29, it just stinks that i spent every penny I had going to school for something ill never be able to get a job in.