Thinking about leaving my job

I’m at a standstill with my life at the moment & I’m thinking about quitting my job. I work in healthcare & it’s very straining.I constantly deal with people being very rude to me & I don’t think healthcare is where I’m meant to be. I also don’t feel like I can move up in the company I’m at & I just feel no motivation at all. The only thing holding me back is that I have bills to pay & I don’t want to leave my fiancé with all the expenses. I thought of going back to school full time but I’m not sure if he’d be okay with it. I’m not sure what to do & I thought I’d seek some advice through here.