I pasted a confidential client document into ChatGPT and then immediately wondered if I had just done something very stupid

It was a contract draft. I wanted help tightening the language in a specific clause and it was just faster to paste the whole thing in rather than retype the relevant section. The AI helped, the clause got better, and then about thirty seconds later I had a mild panic attack wondering where that document now lives.

I went and read OpenAI's privacy policy. It is eight thousand words long and I understood about forty percent of it. What I could not get a clear answer on: is that document stored? For how long? Is it used to train future models? Can anyone at OpenAI read it? Could it surface in someone else's output?

I work with clients who would not be pleased if their confidential documents were sitting in a tech company's training dataset. Did I just do something I need to disclose? What do people who use these tools professionally actually do to manage this?