Been doing some progress. Instead of thinking how disabling the pain is I started doing stuff I couldn't do before: like reading/playing games/using sketchbooks.
To overcome my fear of pain I began doing these short studies on my handhelds. Now I can use 3DS again!
Moral of the story: stick to what you are good at, and do your projects in the way it's fun (and easy) for you. Especially if it's a long-term project.
PS. Have an animated Pachycephalosaurus. It's the very same one you could meet at the lake :)