Need help. Am I gonna gain weight from bread?

So yesterday It wa my treat day. I do that once a week, all the other days I eat good. But I had a slice of bread in the morning, a sandwich, and a slice of pizza. I didn't go over my calories, only a little because I am allowed to because it's treat day. But will that bread make me gain weight? I DO NOT do this everyday. And I'm a 13 year old girl, and my dad says I have a fast metabolism. An my dad says the bread will do nothing to me because of my age a activity level. I workout everyday 3 times a day. But this week it's been on and off, so like one say I did it 3 times and one day I did 2 because I am sick.