Sometimes its easier to keep going without thinking. Sometimes its best to control your thoughts, take command of the situation and fill your time with practical things. Sometimes, when the light is fading and bed is beckoning and your mind slows down to contemplate the bigger picture, it is easier to fill your head with a mindless novel and wish for sleep with all the denial of someone turning their head off.
I turned my head off in July. It is September and the leaves on the trees tell me the warmth is going. Wait for me. It will take time, but I will turn it on again.