Did i just cheat and break my diet?

OK so my stomach had been growling for a couple of hours I ignored it because I was going to bed then it started to feel really uncomfortable like someone was sitting on it so I realized I'm not going to get any sleep unless I eat something so I went and ate a slice of cinnamon bread i feel alot better now but I feel an increasing amount of guilt mind you I've been dieting for 5 months I feel like I broke my diet.