Now what?

Now what? After off for four days. Worked on a day shift. Then a night shift then off then another four night straight. Now what? Yes I am angry because I am tired. I'm only halfway of my night. Imagine I need to do two more? And tomorrow need to attend my youngest activity at school for two hours. Where will I get my energy? Especially that I am not feeling so well because of my sore throat. Now I really want to cry....