I ate a donut and feel bad?

SO I'm trying to get a toned tum, its already flat, and i go out 1 hour runs every second day with my girlfriend and when i got home my mam bought me a donut and i felt to bad not to eat it so i ate it, is this okay? Im going to be working out again next day after rest? I feel so bad :(
I ate a donut and feel bad?
Post Opinion