Why not put the horse in full training while you're convalescing. Not necessarily for a certain discipline but to diagnose and evaluate why she may have blown up and to correct it. It would keep the horse fit while you convalesce and it might iron out whatever bugaboo she had that caused the bucking fit. Then, when you are ready to ride again, you won't have as many little voices in your head whispering doubts at you to make you lose your confidence.
I'm so sorry to hear about your leg. I had a crush injury to my left foot almost 4 years ago, nearly lost both foot and leg due to compartment syndrome. It was caused by a horse, not the horse's fault but mine, but I get the issues of a lengthy healing period. I was 52 then, now 56, and I'm still dealing with some of the stuff that injury caused. My non-horsey friends all thought I should have had all my horses shot for the injury, they just don't get it. I think KNOWING for sure that the horse was not at fault and what I did that caused her to step back on me helps a LOT in keeping the doubts and fears at bay. If I had no idea why she stepped back onto my foot and then rocked back, pivoted and basically did a roll back on my foot, then I think I might have some fear working around the horses now.