Hi,
These symptoms largely sound related to your schizophrenia diagnosis. However, I have OCD, and I can definitely relate to the feeling of not being good enough. It must be very difficult to have that feeling AND experience voices that are telling you to believe it's true.
Please know that the voices are wrong. Who you are as a person is not what you are feeling right now, what the voices are saying about you, or the strange feelings you feel taking over your body.