Hi,Mary, Thanks for the query.
We are very sorry that your leg has been amputated.
Frankly I would like to say one thing that these prosthesis
are design in such a way that one can walk easily.
Since in your case this is not new as your's leg has been amputated just now and not much time has passed , that's why you are feeling very difficulty in walking.
There are two things that one is a trauma through which passed as one leg is cut. 2ndly still you are in anxiety
Please don't be depress as time pass you will adjust yourself according to condition and than every thing will be right for you, till wait.
Good luck and best wishes for smooth walking.