If you can't find your topic where you left it, there are only TWO reasons why:-
1. It was inappropriate and we removed it from public view.
2. It was moved to another section.

In either case, the FIRST thing you should do is...

Click on your username at the TOP LEFT corner of the page and select "Find Topics". There is a list of topics started by you, in reverse chronological order (means latest started at top).

If you cannot find it with this method, means your topic has been removed due to reasons we deem fit. You may PM any one of us to find your missing topic, or appeal for reinstatement of your topic.

Hope this clears up any doubts.