Tiredness

So far, touch wood, I have managed to avoid the plague of cold and flu that is so common at this time of year, and brought into focus particularly at the moment due to the swine flu pandemic.
But I've been incredibly tired.
Both nights after placement I have been incredibly exhausted; Wednesday night dinner was a few glasses of red and some corn chips.
The rest of the week has not been much better, despite early nights and frequent sleep-ins, I can't seem to shake this overarching sense of tiredness.
I remember in supervision once my supervisor saying to me to notice when we feel sleepy in group or individual work, because it may be indicative of something that ourselves or the group or client does not want to deal with. I am currently working on an essay that is intellectually demanding. I engaged with the subject, read the readings, and have faith that I can write this essay, and write it well. But there's still the niggling anxiety that I have to hold at bay, that perhaps I'm not up to this challenge, that perhaps I will not be able to do this assessment piece. That irrational fear that gets in the way of getting this task done; the fear that is at the root of procrastination for many people; the fear that they are not up to the task.