Turned in my Resignation

I'm an LPN and have been the MDS Coordinator at a 105 bed facility for 7 mths. I was hired with no experience, and got approximately 1 week of training (from a corporate MDS consultant for the company) spread out over a couple of weeks. When I was hired, the DON at the time (their on the 3rd one now) told me that they would try not to work me on the floor, so the MDS work could get done. Nobody else in the building has done this job, so they couldn't help me at all. I've worked M-F, at least 8 1/2 hrs a day, and at times, I work weekends to get caught up.

The MDS consultant also assists in the MDS billing for my facility, and has told me over & over, what a great job I'm doing. But, I've never had a job review/evaluation - nor has anyone come around to 'check' that I'm doing the job correctly.
This past Friday I was in a department head meeting, and it was told to me that I would need to be added to the 'on call rotation' (which is a week at a time) as part of my job. During this meeting, teamwork was also talked about, and suggestions that we 'dept. head nurses' need to work together to see that things get done (because we're in our state survey window).

What pi**es me off the most, is that nobody ever came to me and said, "hey we could really use your help out on the floor - would you mind picking up some hours?" And when I was 2 weeks behind on the MDS', nobody talked about team work and giving me any assistance when I needed it. So, I went to the administrator, and turned in my 30 day notice.
I've known for months that I didn't want to keep working at this facility - there's alot of angry people working there, I have to fight with the other team members to get them to turn in their parts of the MDS, and many of the dept. heads haven't had any sort of raise for years.