I feel like a COW!

I have not felt good the past couple of days, just real run down feeling, I am not sure what is going on. Maybe it is because I have not been eating right, yesterday morning I ate a sauage & biscut and a Good lunch but when I got home, AGAIN I was hungry and on impluse I went to Ihop and at a grilled cheese and fries! I just don't know why it is so hard for me to get back on track, I have done it for months now I am messing up all the time, today I done great, at egg whites and apple for breakfast, forced myself to eat 14oz of grilled chicken and Corn ( No butter or salt ) Now I am just stressed about how I plan to do dinner without screwing up royally again... I have felt miserable tired like, I am just to tired move...