I agree with Coach Nancy. Food is fuel. I nearly decided not to work out today because it was a rough day and I was feeling very negative about my work and myself. I wanted to curl up in bed and say good night to the world for about an hour. I decided to bicycle instead, and found that when I thought about my frustrations during the workout, it actually helped to fuel the energy needed to get a good workout done. I find that if I crave something for long enough, it is easier if I eat just a small portion, rather than to deprive myself of it. I've tried deprivation many times, and I always end up giving in, then because I think I've failed, I just lose control. It is okay to have something like that once and a while. You just have to make sure you need the calories and carbs this evening. Check your calorie needs. Also, since Mac and Cheese is a high calorie, high carb, low yield food, it is definitely not the most healthy choice, so be very strict with yourself when it comes to how much you eat of it. I have actually been guilty of consuming almost a whole box a couple of years ago because it is such a low yield food, meaning it is a fast calorie light weight food, it is easy to eat a lot of it. If you find you have a hard time controlling the portion size, then be very careful of deciding to eat it.
Glad to hear you decided to exercise. We both beat that nasty demon today!