Sounds like you have suffered a bit of shock which is quite normal the body is put under a lot of strain and numbness is a common irritation.

I would suggest placing some ice on the effected area for at least 15 – 20 mins and leave for 10 mins and repeat until swelling reduces.

If you have the same numbness after 24 hrs consider getting it checked and def within 48 hrs.

It is a fairly common symptom but not one to be ignored.

Take care
matthew