I need to hear a bit more; what did they mean by 'suspend'? Are they holding your position until you can resolve your issues? Do they have a high turnover of nurses? Because if they do, it is for a reason. I'd ask them to clarify what they mean by suspend before I quit. But, you have to do what is right for you because you work to live, not live to work, and if your life is not in balance, then, it may be better to find an alternative position.