I had something similar happen to me.
I was about to go up the steps to my deer blind and see a wide 8 in the food plot about 40 yards away staring at me through the brush
Shoot he is wide and I am excited, he starts walking away I hurriedly get up in the blind look out the window and he is walking directly away from me and about to go onto the neighbors property.
Of course when they are walking away antlers look bigger and wider right! Rifle out the window hoping that he would turn a little before he hops the fence, he looks back at me and BAM, drops in the Sumac and briar. Excitedly I walk up to him only to feel really bad about shooting a 2.5 year old buck
He did have a 17 7/8 inside spread which is mainly what my eyes were locked on, live and learn. However most of the guilt went away every time I made a meal with the meat he provided.