Something similiar happened to my sister when we were little. We were both at the eye doctor with my mom, he was doing all that scary stuff with the machines in are eyes. He was looking into my sisters and he starts telling my mom all this stuff that made no sense to us. You could see my moms face start to get worried. The he said "Its very possible she could have a brain tumor very close to the front of her brain." So we were old enough to understand what that means! We both freaked, my mom got mad and said something along the lines of how can you frighten my children like that. So anyways she went in for test immediatly, had to drink that die stuff that charges your blood funny colors and went through a few scans to see where it was going. All the stuff hurt my sister like hell but it came back she was fine, just had something wrong with something behind her eye (eventually also causing her to wear glasses)it was scary since we were so little, would be scary today. But shes fine and thats all that matters. Could be nothing, but I understand your worried. Good luck.