Rest up but make sure you don't stiffen up so include some light stretching Matt. You already have a long record of training so there will be no problem for you once you decide to go back. While other with hiatus may quit, you won't so rest and get better my friend.
Well now I never said for sure I was going to quit... If life ever gets too much and I ever want to end it all in a blaze of glory for sure I will be going back to that BJJ club!!
Seriously though, do what you can while you can Matt. Euan Burton, a Scottish Judoka who fought in the 2008 Olympics had a blog on the BBC website. He talked about doing yoga while he was injured. He said it helped him a lot.
Rest up and get well soon.
"Let your food be your medicine, and your medicine be your food"