Does anyone of you loses a child?

2007 my brother died. It was very painful that I cried for the whole night. I can't accept the fact that he's gone. I'm his guardian for a long time and hes like a son to me and I can't accept it at all. Last month, my cousin's son died. I don't know what to say to her because I can't imagine how painful it for her. She had miscarriage during her first pregnancy so when I found out that shes pregnat, we prayed that the baby will be fine and she did eberything to keep her baby as well. But, tragedy came. Her baby died because a careless doctor injected some medicine to the baby then died right after the injection. As I was looking at her childs tomb, I was like dumbfounded. I dont know what to say or what to do to make my cousin feel better. All I did is to watch her crying hugging her baby's shirt. Tears fell down on my cheecks. I was so hurt when my brother died then how much painful it is if you loss your child.