I might be overestimating my abilities

We had our first event in a series of 3 for February at work tonight.  I started it early at 5:30 so it could end at 7:30.  I am really exhausted after a full 12 hour day. I'm wondering how on earth I am going to make it through the Valentine's Dinner event that ends at 9pm, and even more Passport! I'm supposed to leave that one at 9pm and I will be 8 months pregnant, I just hope I make it that long.