You have been given some good advise about talking to your husband and the grandmother. However if they do not accept your disorder they it may be hard for them to change, BUT it is definitely a good idea to try. Another idea is to get your family some information from your doctor or therapist and have them read it. Another idea would be to have them go to either a doctor visit with you or a therapist vist with you. They truely need to understand your illness and what you are going through. It will help your situtation immensely.
Your child is probably picking this all up from them and being torn down by them and them making fun of you is an abuse in itself. Don't feel so terrible about yourself because you know the truth. Just pray that they too will WANT to understand.
Keep trying, perservere no matter what.
Rainbow