Have I traumatised my puppy?

I think I need to give some background context here. We have a puppy and she’s been with us for a week- 9weeks old. Adore her. We have been very consistent, very firm and loving as she will be a large breed. Everything feels like it’s clicking into place, she has great manners a sweet nature. We’ve been socialising cafes, vet, ducks livestock etc and we really are trying very hard to make sure she’s a good doggy citizen. Today we had an incident with a balloon. Totally avoidable in hindsight but just one of those freak things. She ran away round our dining table and it was trailing behind her. She even did a poo with the shock. It cannot have been more than 3 seconds in total. I’m so devastated I feel we have failed her. Will she be anxious going forward? Have we ruined our confident funny puppy? What should we do to build her confidence back up ?