Please help: Shadow above incisor (please see X-ray attached)

[saffy]

My dentist took an X-ray as I have a small clear bump/bubble that comes and goes above my upper incisor. The X-ray showed a slight shadow above the tooth so was sent for full mouth X-ray. I now have to wait over 35weeks before I can be seen back in the hospital to go over the results. However I have the X-ray and would like a dentist on here to give their opinion if there is anything sinister going on in the X-ray?? Kind regards.