Hello Ann and welcome to HealingWell.
I know that some meds can and do cause liver damage. Is it the same doctor telling you that you have hep C , that's also prescribed the tegretol? If so, you may be right about them trying to avoid a law suit.
If you actually do have Hep C , you should still show positive for it whether or not it's inactive or chronic. My husband had it and somehow he beat the virus. His doctor said he was one lucky man.
I definitely would go to a different doctor and get a second opinion.
Good luck......thoughts and prayers.......