Fight fatigue

Someone help me fight this fatigue. Coffee is bad for me but I have to have one cup. I need to stay awake. I have too many kids to take a short nap during the day and their bed time is at 9. I want to go to bed around 4. Can't stay awake, I don't want to cook or do laundry the most I can do is clean twice a day but that's if the kids make a mess during the day. When I have energy it's still not enough. I make the kids clean also but of course telling a 6 and 9 year old is like telling a teenager no, and getting into an argument.