When is it time to move on?

I love my job. I really do. I was a supervisor and decided to go back to direct patient care, on the floor.

I feel like I am very good at my job. I am always on time and I rarely miss work. I am reliable and I think I have good critical thinking skills. I am very comfortable being on the floor. We all know that nursing (pretty much no matter what "specialty") is stressful. Although I like my job and feel like I am good at it, I have become very irritable and bitter at my coworkers, my supervisors, and upper management. I find myself finding other nurses' mistakes and finishing tasks (mostly paperwork) that they should've completed. Instead of taking initiative and dealing with changes in condition etc they wait for me to do new orders.

I am very vocal about the problems I've been experiencing, but instead of getting help I feel as though I am being labeled a "*****" which I am far from it! No matter who I complain to, nothing changes. My supervisors understand, but I receive no support from them. They always act like they have better things to do...and maybe they do!

I feel like I am frustrated and irritable at the staff for this and sooo many more things. I am not getting any help from anyone. I am literally carrying this facility on my shoulders with NO support, NO help. My phone rings at all hours of the day, including my days off, and it is always work related. I feel like it isn't rocket science and they need to figure things out without relying on me so much.

I like my job a lot and I like my position at work. I also like my schedule very much.

HOWEVER I don't expect things to get better. I am pretty sure I won't get a very good pay raise at my upcoming review.

So.....when is it time for me to move on? I am well aware that the grass is not always greener, but I am thinking this current situation is unhealthy for me. Any advice or words of encouragement will be appreciated :)