Panicking about money

I am a registered nurse and took a low stress job that is not paying me well. I want to leave but they are begging me to stay and I already know are gonna despise me if I leave since they’ll have no nurse. but im panicking about money. im 26 and have like $12k saved up. I have to get a new car soon, how will I ever afford a life on my own one day?? im freaking out. like I studied so hard in school and this is what I decided to do… im just so mad at myself and feel like i’ll be broke my whole life