I don’t think I have ever changed my mind and deleted a story I just wrote, but I have sent emails to people and wished I had deleted them and not sent them. If someone has wronged myself or my wife in a way that made me very upset I have reacted without thinking over the situation and sent an angry email telling the person exactly what ai thought of them and their actions.
You obviously did the right thing writing about your foster parents, as so many others could relate and sympathise with that. So, don’t feel bad about it.