It would be useful to reconfirm if you indeed are Hepatitis B positive since your earlier report was negative. If indeed it is positive, then people like you who do not have the symptoms of disease but have viral markers are known as carriers. The specific response to your questions:
1. There is no need for you to stop breast feeding. However, your child must receive the full course of vaccination for hepatitis B.
2. I have no knowledge of herbal medicines. It would be best if you get yourself examined by a gastroenterologist regarding the future treatment in your case.
3. You have no dietary restrictions at the moment.