Adult daughter with stage 4 breast cancer and bone metastisis

My daughter was told she had stage 4 breast cancer 9 months after having her baby girl (her only child). The breast cancer went to her spine and ribs, so it is not curable by any means. Everyone in the family is devestated, but carrying on as usual. I'm having a very difficult time dealing with this news and need to talk with anyone who is in similar situation.