No advice, just sympathy from me.
My wife shot an arrow through her hand 2 weeks ago, the arrow must have been had a crack at the fletched end. Split on release half the arrow went one way, the other half the other and a fletch embedded itself 2 inches into her thumb, she is a lefty too.
Had to give it a hell of a tug to get it back out, and then a trip to the hospital. Nothing too serious, they cleaned it up and put on this special dressing which looked like a second bit of skin. It's still sore but she can now shoot a bit, hopefully it will be fully better in 2 weeks as that the UK national championships which she is likely to do very well in.