Wow...Things have changed

Well...I am a college graduate. My mother and my sister's kids have moved in with us. I have 7 people living in a 3 bedroom house. I am tired, angry, upset and did I mention tired?! My life has been thrown into disarray, but nobody cares. I have 3 kids that aren't mine living in my house, and they are awesome kids. (It's not their fault that their Mom is an as*hole!) My mom isn't well. She's on dialysis, and she's had a few mini-strokes. It really sucks. She is in pain/miserable. I am working, Sean is working, and we have 2 kids under 5 that stay home with her. The youngest isn't potty trained, and I need suggestions on how to make THAT happen immediatley. I need assistance with daycare for the kids, because the 9 year olds can only do so much... Somebody help me! Please?