Shalom,
I cannot believe how dumb I feel. I am at work today and even though I called my rabbi last night to discuss the fast, and even though I told my boss about the fast yesterday, I almost was about to go get something to eat... This has happened to me before (that I almost forgot about a fast day). Unfortunately I let my mind think about eating and therefore now I am hungry. I am grateful that there is only another 5 hours of fasting today before the onset of Purim and the feast tomorrow.