What did I do?

I have NO idea how it happened but I was experimenting on Sunday and somehow my original design disappeared...my primitive stars template that I was so very proud of, that I had done all by myself...GONE...and only a blank background remained, staring back at me. I am quite devastated and even after hours of searching, I am unable to find it.
But I will persevere until I can restore it to its original glory. Wow, do I wax eloquent or what?