graduated

I have graduated from 2 crutches to 1.  I do have good range of motion in my right knee but I am just afraid to use it!  I have to get past the fear.  The physical therapist told me today that I need to work on my confidence.  Sounds a lot like what my mental health therapist is saying.  What is my body trying to tell me?  Do I have to fall completely apart before I listen?