Help! I'm in a Pickle!

So I'm in a pickle. I started working with this current family a little over a year ago. I was at the time working about 45 hours a week but they were very flexible. I was paid a weekly salary. I had vacation but never had to use it because I worked most of my hours in a few (long) days and the other days were a few hours here and there. The long days were rough but having the early long weekend was worth it. Well when I was interviewed they said no cleaning would be involved. If I had time, I would clean a little and do some dishes. I would also take the kids out to activities, something else they never asked for. Well suddenly if I didn't do the dishes they would mention it as if it were a requires duty. Also if I didn't take them out one day I was grilled about it. Then the hours changed. I was told i would still get out earlier one day a week but when the time came I was still pulling 5 long 10-11 hour days. I'm also in school at night and they knew this when I was hired. When I finally mentioned this they seemed very annoyed. They've seemed to be trying to work with me but only temporarily. So after a while it will go back to the other hours. I'd love to work with them but I need shorter days or maybe 4 long days and 1 regular one where I can just get out a couple hours early. I've nannied and worked in centers for years. I also don't get paid for the overtime that I've started working and she had promised a nanny contract but still hasn't "gotten to it" over a year later. Those are all things I should've mentioned before and now I'm so burned out. Idk what to do. Any advice? Am I being crazy or is this not ok?