What To Write When You Have Nothing To Say (but still want to let people know you are OK)

I have nothing to say. I have nothing to say. I have nothing to say. I have nothing to say. I have nothing to say. I have nothing to say. I have nothing to say. I have nothing to say. I have nothing to say. I have nothing to say. I have nothing to say. I have nothing to say.

But...it's OK because I am just suffering from a post Christmas hangover due to; too much traveling, too much food, too much drink, and too much noise. This makes me too tired to write.