Investigating in a cemetery locally here in Tampa Bay, Florida we noticed the 'cemetery energy lights' in some pics and 'orbs' that you can tell was dust or bugs. In a lot of the pictures there was something tiny but it had wings and glowed on it's own, looked just like your pic. It so totally was not a bug. It seemed to follow us around as it's in many of our pics. My daughter thinks it's a fairy! Perhaps an angel?
I would be glad to swap pictures/stories.
I'm Hula Doll on Facebook.