Hello,
I have the problem of telling people private information, which now, I fear can get me into big trouble. I need a spell to make someone forget what I said. Please, if anyone knows how to help I would be very glad for your answer.

There is no such thing. It's up to you to keep private matters and information to yourself and not blab. Why can't you keep secrets? And how old are you? (I'm guessing 11 or 12.)

If you do not have the discipline to forbear blurting out others' secrets, nothing you try will be focused enough to be effective.

Focus on not receiving information you can't keep.

Sorry, there is not such thing. Your problem was telling the information.

Perhaps you need a spell to keep you from revealing things that you shouldn't.

Once people learn you are a blabbermouth, they will not tell you their secrets. Once they learn you like to gossip about everyone else's secrets they will stop talking to you. So stop being a blabbermouth, and a gossip, and you are cured.

For magic spells, call a witch. I think it's easier learning to shut up and control your mouth if you don't want to get in trouble for your words. Try THINKING before you act, or speak.