I want to see if I asked a question before, before I ask it again.
Didn’t you post about this last year?
If you open the search screen and enter some keywords in the Search By Keyword field and your own username in the Search By User Name field, the results will find your own posts that contained the keyword(s).
You can also play with the date ranges at the bottom of the forum page, then sort it by author, then go to the right page.