If it an older post as well as a post that shows in the manner Bobby131313 mentioned you can hit the "search" Button near the top of a page. Then use the Google search first by entering you name (3193zd) and several key word you remember or can guess about the post in question. For example:
My C3a was fake 3139zd; Boy was I wrong parcelpostguy. The lower option below the google box can help as well to narrow down the searching.
Edit:

And we have a BINGO!