You can find old posts or threads by clicking on your own user name and going to your profile where there is a menu bar with the word Statistics on it. When you click on it you get a choice of bringing up previous posts or previous threads. Threads are always easier to find because there are way fewer of those as a rule than there are posts.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.