Exhaustion is a real thing. It happens when you are chasing too many things at once, your energy becomes unfocused and everything you've got gets thrown to the wind.
This happens to all of us from time to time. The key is to notice when it is happening and slow down. Taking a break now will save you so many problems down the road. It will save you from having to correct mistakes you made when you were tired and having to spend extra time off trying to get your energy back together, as well as much time reorganizing your plan to fit in all of the craziness.
Have you hit your rock bottom low yet? I hope not. Don't wait until you get there. Take the break now. Take them often. You are not lazy, you are preparing your mind, body and spirit for the long journey, not many short ones.