oh no romy that sucks!
well, people used to use prosthetic legs which were basically a lower leg
that you kneel on top of. so picture an upside-down L and your bad leg is
bent at the knee 90 degrees. your lower leg is strapped onto the top part
of the upside down L.
you put a bunch of padding on the top, and use padding on the back of your
calf, and then you can wear it for hours and walk on it just fine.
people whose feet or legs were chopped below the knee walked around on
such things their whole life.
like this:
http://gajitz.com/running-start-temporary-prosthetic-for-lower-leg-injuries/