Hello Good Evening,
According to you description you might have a fracture
of that site.
Because already a ample time have gone to swelling to subside, so you should not wait further.
So now you should go for a X-ray of hand, to rule out any bony injury, which might be a fracture, can be a displaced also, and may needed for a surgery.
So you should not wait further and consult to a orthopedician with a X-ray, for clinical examination also, which will be helpful to find a tendon injury
, if X-ray says nothing about bony injury and he will guide you for further management.
Dr. Naresh Jain