How can adult guardianship be dropped. Guardianship was granted because of a train/car accident and a traumatic brain injury. It has been 5 years sinc

I was front seat passenger in a train/car accident, which the train hit the passenger''s side. I was in a coma for 7 weeks, and was paralyzed for a little while. Within a year after my accident, i''ve come out of the hospital and a traumatic brain injury rehabilitation center. On top of it all, I still graduated with my twin sister. I also started attending a technical college for two years. After four semesters at the technical college, I had some medical problems and was overdosed by one of my sleep specialists in taking 5 different sedatives. My doctors didn''t know what to do because I hadn''t slept for close to 2 months straight. A different doctor finally figured what medications I should be taking and i''ve been sleeping great ever since. My mom and dad have still been my power of attorney and guardians and i''m wondering how to stop it. I am taking a college course now and soon I will be able to take more but i''m 21 years old and I feel as though I no longer need guardians.