Hi, thanks for writing to HCM.
It seems from the description that you have a soft tissue injury
of distal leg resulting in hematoma
formation which will be tender to touch. And your numbness
in the foot could be attributed to the concussion injury
(neuropraxia) of the cutaneous nerves which should resolve spontaneously over a period of time. So i think there nothing much to worry about.
If you are still concerned, consult an orthopedic surgeon and follow his advice.
Hope this helps