I watched my brother die

I watched my brother die. He was swimming, and then suddenly, he was drowning. I could've saved him if I reacted quick enough, but I didn't. The doctors tried to being him back, but he suffocated on his own vomit. The lack of oxygen left him braindead, so my family pulled the plug on him. It happened three years ago, but to me, it feels like it was only yesterday. I still have flashbacks, I still wake up in the dead of night with nightmares of it. I still can't get near a body of water without having a panic attack.