J.B.
I know this comes a little late , you've probably already gone to see the Dr. but I just wanted to tell you that I know from experiance that ometimes that just happens, it happened to me when I was little and my little girl (10) as well and it just fixed itself after just a short time....it's just one of those things lol I would not worry too much.....altho I would like to know what the Dr. said it was......