Wow, I got tired just reading your post. You really do have a full plate in front of you. It may be time for you to slow down just a bit. You said you are having a hard time focusing and keeping late hours. Your body is getting tired of all that it is doing and needs a break. You said you work full-time, who takes care of the kids while you are at work?
This is what I do when I need a ME day. DH goes to work, I take the day off from work, and the kids go to daycare. So it is just me and the dog home (and he makes me feel like I'm in HIS way). I spend my day doing NOTHING, no housework, no laundry, no nothing. I watch tv, take a nap, maybe take a walk or go shopping but that is about as active as I get. It really is wonderful to have a ME day and by the time my ME is over, I am ready for DH and kids to come home. Try one, you may like it.