Tonight has gone down the tubes

I was having a really good day. Food choices were in line and I enjoyed what I had during the day. I came home and had a small dinner before heading out to Tai Chi. Great time at Tai Chi. We are now up to move 14. Then at some point something switched in my brain. I am not sure what it was. I am still trying to analyze my feelings and what happened. I can not pin point exactly when things started to cycle in my brain. It feels like it was a switch, but it might have been a gradual thing over the past couple of days. Finally tonight it came to a head. When it became all about what I could eat before bed. Tonight I binged.