I think this is a common injury for moms....i have some kind of nerve or tendon damage inn my shoulder / arm that is causing terrible pain in the outside of my elbow. I'm sure it's from both co-sleeping and the 2 weeks I recently spent holding my daughter for all her naps.
The pain is sharp, shooting, sometimes electric feeling. It happens when I do repetitive motions, like chopping veggies for dinner, and when my arm is in certain positions.

Anyone else experience this? What did you do to help it go away?

We have stopped co sleeping, which definitely helped, but it's kind of hard to do complete "rest."