Well, you need to know that this too shall pass, and we will support you the whole way! I am so very sorry that is all I can offer.
I will tell you that hormonally, you do get hungrier when you have not had enough sleep. There have been studies. Make yourself a nice grass fed steak and a plate of greens before you leave.
Remember that getting off somewhere and having a good cry is going to be much better for you than eating. Do it as often as you need to!