What to do?!!!

I returned to work after 12 weeks of ML.. I only worked for about 3 weeks, then DH decided it would be better for me to stay home with our kids. I have been home since October and about 2 months ago I decided to help out some friends and started keeping their children as well. It has been complete and utter hell. I feel as if I am getting burnt out on staying home, 4 children is some serious work. I am in a constant circle of cleaning up after the kids daily, her children will not listen to me, and I fuss ALL DAY LONG. They think its hilarious when I fuss and when they get put in time out..They pay me, not much, but I honestly am on the verge of just returning to work because it was way less stressful for me. Idk what to do.