You just have to do three things:
Cry until God gives your soul rest.
Give the care of his still-living soul over to God.
Sleep as much as you can until you heal some.
I buried my son's body on his 27th birthday, so I know. That was over 30 years ago. My Scott visits me often in my dreams yet, mostly as a teenager. Your son will be with you the rest of your life, so don't panic. He will be in your sweet memories as long as you live, he hasn't abandoned you and you're not at fault. God chose to take him, now. Let him go. It's only his body that stays.
May the Lord comfort you always, as you get ready to go on. Bless you.
Marie,
We pray that Jehovah God comfort and heal you.
We ask in the Name of Jesus The Christ.