Mawd,
I was ironically just looking into this and came on here and saw your post!
I don't know if your pain is the same but I get a shooting pain in my left hand/fingers that goes up my arm, and sometimes goes all the way down to my foot. Makes my knee and elbow on my left side hurt so bad. It's sometimes accompanied by tingling in my palm/tips of fingers or feet. I've also noticed that it gets really bad when I'm cold. So bad actually that my fingers get stiff and it's hard to move them(kind of like they're actually frozen), which is obviously hard to do anything with that hand.
Thank goodness I am a righty! 😄