Still in search of missing sibling

I now have reason to believe that Robert Phipps is not my brother. I am still in search of my sibling born at St Elizabeth Hospital possible birth date from June 1955 to early 1956. My mother said it was warm when the child was born. If anyone has any information about someone who was born and adopted during this time period at St Elizabeth please contact me ASAP. My mother is not in the best of health and I would sure like to find my sibling so they can get to know each other before something happens to my mother. I think it could bring some peace to both of them.