From what I understand children are incredibly tiring to care for day after day, even if you love them. I have enough trouble as it is just handling work, study, eating good food, and personal projects during the down periods, so I imagine it's hard to get up knowing that it's just going to be wild.

I used to sleep all the time, too. Only thing I could recommend is more water and better food for a little energy boost to hopefully keep you up until nighttime.