I know the feeling man.
I broke my shin bone, growth bone and my ankle pretty badly that my foot pointed the wrong way.
It took 9 weeks until the plaster was off and then i had to where a boot that made me look like a robot.
I took me 3 weeks to learn to walk again as the plaster was up to my groin.
I found that sitting on an exercise bike for an hour or so a day (in my case it was all day because it was mid summer and i had nothing better to do) helped to loosen up my muscles and started to help me gain strength back into my leg.
Also some of it is in your mind, the day my plaster was taken off the doctor told me to walk on it, and my mind couldn't process it so my leg just wouldn't move.
Anyway, enough of my unnecessary babble, hope you're back to full health soon!