Hi, thanks for writing to HCM.
The description suggests that you sustained a soft tissue hematoma
as the xrays are negative for fracture
These hematomas usually resolves spontaneously within 3 -4 weeks.
Keep intemittent hot fomentation and an elastic pressure bandage around the swelling.
Transient numbness or tingling
is commonly felt at the site of injury and is a normal finding which recovers over a period of time.
Hope this information is helpful. Good day