You can go to the home page and search through the pictures section, but a faster way is
Click on your name above your avatar
Your public profile will appear
On the right hand side of the page, you will see "number of topics created" or words to that effect.
Click on that, and you will have a much shorter list to go through.
Did you ever find the name of the spiky quilt here?
http://www.quiltingboard.com/posts/list/23820.page