Cavity under 5 months old crown ?

I had a crown and a root canal done five months ago after finding decay under an old crown on #3. Last month I started having pressure in the crown and the crown is very sensitive to percussion, but ok for biting. I’m very used to having crowns and It does not seem normal. Could it be a cavity under the new crown ? I join an x-ray. The x-ray is after the root canal (temporary crown) and before the new crown. Does the x-ray show any decay ? can I know without removing the new crown? Thanks