DRINK!
Nah, seriously, been there, done that, don't want to go back. I was on my back for almost a month with a torn hamstring, so I know where you are. The toughest thing is to fight the anger and possible depression (in my case) that comes from immobility. Stretch as much as you can. Do whatever core work you can since that seems to be the one place you DIDN'T get hurt

Hang out with people. If you sit alone and sulk, bad things, man.