Exhaustion

I am still in the lab and I am beyond exhausted. Couldn't sleep much last night and haven't been sleeping very well for the past couple of days. All I would like to do right now is to curl up in a ball in a corner and go to sleep. I have about 3 more hours of work here if I am lucky. I am not sure if I will be able to remain awake for all of that time. Tomorrow is going to be a very long day also with many meetings in the morning and seminars in the afternoon.