If the question was posted no more than 60 days ago, it will be present in the list of deleted questions at the bottom of your questions list.
If it is older than 60 days, you may still be able to find it from the reputation tab. Check "show removed posts" at the bottom, then look for reputation changes associated with the post (downvotes, or refund of points at deletion). The tab will show you the post title next to reputation change, even if you don't have 10K required to access a deleted post.
Super User has a chatroom Ask a Super User Moderator. You can ask a mod there to find the question for you: they can see the list of all your questions, and can also search specifically for your deleted posts via
user:173513 deleted:1.
user209081