Lisha,
Great picture, and I think you have a great eye for finding things. However when I looked at this, I instantly new it was a reflection of light because you could see the odd circular shape cutout in the middle. So then it was a matter of finding an object with the same patterns in the room. And an object which was at the correct angles from the camera to be able to produce a reflection in that direction. Here's what I've come up with.
Yes, you got it. It was the potty-chair! Its an exact match, including the recessed indentation on the top. That concaved area caused the dark shading in the middle of the reflection. And the "Squished" appearance is because of the angle of the reflection. Its a very shallow bounce from the camera to the wall.
I've added this illustration to help see the formation of the reflection.
Sorry, but KEEP hunting! With your sharp eye, you should be able to find something in no time. Great work!