Don't be embarrassed, OP; you're not the first nor the last to get embarrassed before a user is told that a question is not new to the forum. We can't manage newcomers and regularly send them to read the same threads that have already been created thousands of times. Over time, everyone learns to use the forum, and the questions stop. And the fact that old users are forced to answer the same questions, in a way, becomes ridiculous. Someday, all answers from one user will be considered plagiarism in some sense.