Who do i inform if my physician disclose info to workman comp. without my consent.?

Her paper trail as far as work releases does not make sense. She have me to return to work without restrictions. Then have to fax another stating that i'm on restriction. She have given 5 different work excuses. Then none of them were sign by her and the two that were. the signatures did not match. So the workman comp specialist question her regarding this matter. So now she is mad at me. Now she is calling me a liar and not wanting to be my doctor.