Thanks for writing in,
From your history it is clear that it is nothing but haematoma
(clotted blood). Usually when haematoma resolves, it changes its color from green to black and disappears. Sometimes if there is some haematoma in deeper layers of tissues, then it might take time to resolve. Since Xray didn't show any fracture
, pain has decreased and you are able to do routine day-to-day activities, there is nothing to worry. But one month is quite long time for a haematoma to resolve. So, its better to do an ultrasound
and confirm whether the blood collection is still there. If it is there then surgically removing the collection or just aspirating it by wide-bore needle will help in relieving your symptoms.
Get well soon,