losing weight after baby and injury

I fell and broke my leg a year ago. I was 9 months pregnant with my son. I had a surgery (plate, pins, and tightwire sutures), and then had c section 2 weeks later. It took forever to heal from that and then I had to have arthroscopic surgery in both knees a few months ago.

Meanwhile I've gained way to much weight and never was able to lose the baby weight either. I'm trying so hard to lose it, but I mostly have to do so through calorie control since I really can't do cardio yet.

So far I'm down 13 pounds. But it's so difficult. Anybody else have issues with not being able to exercise very much?

Michelle