Pretty specific fantasy, but whatever does it for you I guess. Its not surprising that you don't do self-bondage as much anymore. Close calls like that can really put a bad taste in your mouth for an otherwise enjoyable experience.
I practically gave up self-bondage (at least full body ties) after I was almost caught tied to my bed once. And that was 5 years ago. Of course then I discovered internet bondage and found out I didn't need to be tied up to get a buzz. Also, I'm more like you in that I prefer to do the tying.
There is only one God, and his name is Death. And there is only one thing we say to Death: Not today.