HI, thanks for using healthcare magic
The x rays would have ruled out any fracture
to the bones.
Since these were normal then the pain is likely soft tissue
Soft tissue pain can involve the muscles, ligaments or tendons.
The small swelling or bump that you are noticing may be a ganglion cyst
. This cysts can occur in any joint but is most commonly seen in the hands and feet.
You can consider re visiting your doctor for an evaluation.
I hope this helps