I agree it would be a good idea to see a doctor. It's not as scary as it seems, they see depressed patients regularly. A doctor can refer you to a therapist or psychiatrist, one of the good things about that is that once diagnosed you can bring a family member to an appoinment with a therapist (or doctor or psychiatrist or counseler) who can help explain the situation to the family member as well, this can hopefully make your family more understanding of the situation.