My question now is, how do I find my post that was deleted and how do I find the thread where I made the post? Have your post been deleted too because it was off topic?
Let me help you.
If your deleted post was very recent. Modlog is actually a good place to check out, and when I looked through it. It appears you and almost a dozen other members had their posts deleted because decided to reply on a very old thread that had been necro-bumped by someone
This is the thread/post -
https://bitcointalk.org/index.php?topic=15260.0This was your reply (you even knew the thread was very old)
This thread was created in 2011 and it's Sad to see that op didn't get an answer before he went inactive 12yrs ago, I'm sure this features hasn't been added to the form yet when op made created this thread because it is very easy to use the ignore button as it is easily seen at the left hand side under where your posts, activity count and merit are boldly written.
Since op is no longer active and the answer to OP's thread has been provided, I think this thread should be lock to prevent spamming.