Absolutely exhausted

P
I'm in the middle of my 33rd week of pregnancy and still working full time (with a 1 hour commute both ways on a good day). I am so incredibly exhausted. I'm sitting here barely able to sit up at my desk and I'm supposed to lead a meeting this afternoon. I am just over being awake and need to vent. I want to work until my due date but at this rate, I don't know if I can physically make it. It's getting to be too much for my body to handle. Anyone else in the same boat?