Hi and welcome to HCM.
Thi sis normal after such fractures
and immobilisation. It is important taht you dont havetingling and loss of sensation and that you are able to move your legs. You must do exercises for knee and ankle because it can become contractured.Isnt there any psichiotherapist to help? ALso you shoul delevate your leg as much as possible and sleep with elevated leg. Also apply cold
compresses on areas of pain. If swelling persist it might be hameatoma which should be evacuated then. Wish you good health.