Mothers who have lost a child and already have one..

i have a daughter who is 3 yrs old i had her when i was 16 yrs old. at the age of 19 i found out i was pregnant again the pregnancy was good and he was born 6 lbs and gorgeous.. after we went home 4 days later i took him to the hospital where he remained and where he died.. i figured that other mothers like myself have gone through whether now or in the past. i want advice on how they dealt with it.