Everyone has offered wonderful advise. I too, rather I think we all have felt like this with our first job after graduating. My first job was on the rehab floor at a SNF, then, I became a floater because it paid it little bit more, not much, but something extra, anyway they floated me from rehab to dementia or to the long term hall, where I seemed FOREVER pushing that med cart up/down that very looooooooooong hall-way. The majority of the meds had to be crushed, which even took me longer due to the banging/crushing of those meds. It would take me a long time, then we had about 6-8 tube feeders, lots of finger sticks, and not getting a break sometimes, well...I lasted about 3 months. I really tried to stick it out, but I felt so worn out both physically & mentally, I was so drained everytime I left there.
Needless to say, you have to make that decision, but like other posters said, most SNF & med-surg is like that pretty much everywhere. Just keep looking and maybe you'll find a place where you will meet a nice group who do team work & don't mind helping you out.
Best of luck.