I learned that the peroxide is not always the best if not given the right amount. More importantly is that making her vomit a good size stuffie/toy could cause her to choke and that could cause more damage. If don't know if you read the article I just did or not but the best thing right now to do imo is just keep an eye on her. It took Emma 5 days to pass that 1"x3" flap she ate but she passed it luckily. @Davidh knew more about the peroxide than I do.
Will be thinking of her!! For now just keep a close on her on and watch every poop she takes to see if it's in there for at least the next week.