Well THAT'S odd

Ok...so the numb arm thing.  It's moved its way to numb left forefinger.  Wha happen...?

It's the weirdest sensation - you know what I'm talking about if you've ever slammed your fingers in a door or dropped something on your big toe and it goes numb for a bit before the pain sets in?  That's what my finger feels like - only w/ no pain.  Just numbness.  

It's been going on for about 3 weeks now.  It doesn't bother me, it's just...weird.  

Anyone else had this before?