Dear Evangelina903, The little bump over your brow could very well be a small hematoma
due to the trauma to that region. Alternatively it might be small fracture
. Since it has already been 3 weeks and you have not mentioned any other symptoms I can safely conclude that there are no neurological involvment. While most of the small hematomas might take weeks to a few months to disappear, even if there is small fracture nothing needs to be done right now. However if by the 6th week your swelling does not decrease please consult a surgeon.