What do you do?

What do you do when you are having headache, sleepy, but couldn't sleep (since everyone else is sleeping except your daughter who needs attention most of the time? What do you do, when at the same time, you feel that time is slipping by, and you are not doing anything 'productive' such as having flash cards lessons, handwriting practice, reading aloud, or even playing some educational games? What do you do, when, as you sat there, not really having the energy to do anything, watched her walking here and there, stimming, playing on her own? At times like this, I felt that I have failed. I failed to make the most of my time at home, to teach, to guide and to create memorable times with my children.