Behind the Wall of Sleep

From the prompt: S6 Gen or Wincest. Sam wakes up after he gets his soul back; he's confused and stiff after lying there for ten days. He notices when walking up the stairs one of his knees or his hip feels worse than the rest of him but he doesn't think about it--he needs to find Dean. As time goes by his leg doesn't get any better and the pain grows worse. Finally Dean drags him to the doctor and it turns out Soulless!Sam ignored an injury because it would mean too much downtime between hunts and now Sam has to deal with the consequence of it. Prompt posted by chaos_slave, written for the ohsam Sam-focused hurt/comfort fic challenge.