I too had cruciate reconstruction. My graft was taken from the 3rd patella tendon (front of the knee cap) I was told by the surgeon that the graft would be like a piece of wet tissue paper for the forst week or so until it starts to heal. I was in a rigid leg brace for 2 weeks. Only removing it to stretch and bend my knee. NO weight bearing withough the brace until after the 2 weeks. If you've been walking around without a brace I would imagine there is potential to do further damage. If I were you I would go back to see your surgeon or your GP. Without a Wikipedia reference-linkMRI though - only time will tell if you have casused any further trauma to the graft.

Hope all works out for you.