I think you're doing fine. You are steadily losing. I know that you know that you probably will never see another 8 lb lost week again. So given that you've lost 4 lbs in three weeks that's 1.33 lbs per week. Which is nice, especially given your limited mobility right now.
As far as the exercise goes, can you swim? How about sit-ups, stretching? Can you put ANY weight on your foot? Maybe some light dancing? A brief walk? If not, hang in there, the time will pass before you know it.
IF you're looking to change things up, I would probably suggest cutting back on the bread, pasta and rice and ADD in more fiber rich vegetables. They are a weightloss powerhouse.
Just one other thing, are you measuring your portions? Pasta, rice and bread can really add up quickly. Could it be your estimating them wrong and you're really eating more then you think? Just a thought.
A lot of this stuff is trial and error. You will get it all down pat. Hang in there. You're doing just great.