It is important to understand that you don't have the burden of the whole world to carry on your shoulder. It's normal to need breaks, it's normal to feel burnt out. It is very important for you to not shame yourself for being tired. In order to be efficient it is very important for us to humanise ourselves. 

Source: Google images 

Even if the media tells otherwise you are not a machine with a thousand hands that can do everything with detailed precision. You are a human being dealing with a lot of responsibilities at the same time. Yet somehow managing everything and even if you are not perfect at doing what you do. You still aren't giving up, which is very an important thing to appreciate in yourself.