Teri,
I did some studies and research on the picture. From what I see it was taken with a LG phone which seems to be the reason there was no flash. Also there is a lack of camera EXIF data.
It seems it was taken almost a year ago at about 7am. Now, I don't have geographical information but 7am in most areas would be a time when the Sun is low on the horizon and just peering through at a low angle. This angle is exactly what you would expect to create a lighted spot on the wall similar to what your seeing.
I'm thinking that UT is correct and that you're seeing a spot of light on the wall cast by the sun peering through some objects still low in the sky. The fuzzy edges are consistent with that kind of an image.
That having been said, that doesn't mean that your feeling wasn't correct. Just because the image can be explained, it doesn't mean that something was not there. Images of paranormal experiences are rare, but the lack of the images doesn't mean that something is not going on. When in doubt, trust your instincts. There is usually some reason for you to have them, and they should not be ignored.
I would not let the picture bug you. But but instead focus on your intuition. When in doubt, always take the path that makes you and those around you safer.