ask the doctor for a referral to a physical therapist and then after that an occupational therapist so you'll be able to get back to quilting.
the physical therapist will restore you to the best level of motion you'll be able to achieve and then the occupational therapist will show you how to function with a needle and thread given your range of motion.
its a very common form of occupational therapy to refine detailed motor skills. they work with needle, thread, tiger tape, and some fabric.
explain to the doctor that you do numerous charity quilts and the community would feel a tremendous loss if you weren't able to regain this function in your life