For me, a binge is a whole big thing, a whole day that involves fast-food and not counting calories and standing in front of the open fridge shoveling anything and everything into my mouth. Binging is a big scary thing for me so I've learned that I can't just slap that title on any meal or day that goes a little off-plan. I'm actually prouder of myself when I can have just a little of something, enjoy it and move on. But I know that a lot of people use the adage, "one bite is too much, one bite is never enough," and some people have a more rigid, AA type stance on junk food.
I can only speak for me. But through losing and gaining back and years of disordered eating (binging, purging, starving, binging without purging, even obsessive dieting) I have learned that FOR ME, calorie counting is the best plan because I can have anything I want, as long as I stay in calories. And most of the time, yes, you eat heathily, but I can work in a mini brownie, or a slice of pizza, or whatever, when I really want it. And I enjoy it more than when I would eat six brownies or slices of pizza in one sitting. IMO, that is a binge. For me, it has to be associated with a feeling of being out of control, and then eating out of control. So I wouldn't classify what you did as a binge. But even if it was, its in the past, and today is a new day. That's all the matters. Eating chocolate for one day won't kill your diet even if you eat two thousand calories worth. But doing it twice or three days in a row is the bad thing. I would suggest putting it out of your head, forgive yourself if need be, and move on with your diet. Some people have one free day a week. Don't beat yourself up. I've found that weight loss through love is a lot more effective than trying to admonish and shame yourself skinny.
you're doing amazingly keep it up!