Lost my baby girl hope

I gave birth on the 27/08/2019 i didnt expect my baby would have come so early. I didnt know what i was having, When she was born at 25weeks she was healthy with no condition,i had tears of joy. A week later my baby girl passed away and the doctors couldnt tell me what happen. I broke into pieces with my baby girl on top of my chest until her last heartbeat. Even now im broken n i dont know if i can ever be fixed.