Re: pins and needles in thumb.
I think you should seek medical advice form a doc. All our nerves come from the central nervous system in our spine, maybe when this person fell on you . It may have caused a squashed nerve and thats why its still numb. Because Its been 3 days, i would be getting it checked out. Especially if you getting pain trying to urinate. Hopefully its nothing to serious. Keep us posted, good luck.