If you haven't been eating for several days, your system is already starving for nutrients. If you try to eat regular foods, your stomach is going to rebel.
You're hurting your body by depriving it of nutrition. Your thoughts and emotions are all over the place.
In order to get your body, your thoughts, your emotions back on track, you're going to have to eat. It might seem a no-brainer, but it's not. I would go for soup, maybe some applesauce, jello. You need to eat as if you've had the flu because your stomach might reject the food.
If this is normal for you - to starve yourself when things are bad - you are not doing yourself any favors. You need to try and work things out in a different way. When everything is functioning well together (body, mind, spirit), it helps you make good decisions - it keeps your brain sharp so things aren't so overwhelming. Good luck.