Stress = Eating

I am noticing a pattern here. Every single time I feel stressed at work, my eating habits go completely haywire! I'm trying to correct it, but it's getting tougher and tougher to stay motivated when I'm not happy in my job. It seems to be affecting all aspects of life at the moment. I'm not sleeping well which is just making me crave caffeine and sweets! (I normally crave salty foods, but stress seems to make me the opposite.) I have been trying to get it out at the gym, but I feel so wiped out all the time and I don't know if exercise is helping or hurting! I just feel pretty overwhelmed about a lot of things right now. I'm hoping to change my job situation next year, but the waiting is tough. I'm reading a book called "Nurtureshock" right now. It's a very interesting research-based book about how we're raising kids and how we can improve it. Obviously I'm not a parent, but being a teacher, it's quite interesting. I just read about chronic sleep-deprivation and the effect it can have on a person (mainly a child), but the researchers said that sleep-deprivation is a huge cause of obesity. This is scary to me. How do you re-program your body to shut down when it needs to? It's tough when your mind is racing and you can't relax, but then you feel guilty for being tired and make yourself go to the gym anyway...I'm probably over-thinking all of this, but it's stressful in itself! Anyway, I just needed to vent. Sorry for the rambling, but perhaps some of you can relate.