Click on your profile to the left of your post, when the window pops up click on "messages" and it will display your messages latest to oldest - you show currently 561, they show up about 15-20 per page back through about the latest 160 or so posts, and on the last page there is a selection for older posts which will shown about another 180. I didn't dig further on yours to see if we could get all the way back to the very beginning but I'm sure if you wanted to you could find each and every one pretty easily.
