The best thing you can do is realize that God is in control. God allows certain things to happen for a reason. God has not abandoned you. There is only so much we can control. We have to leave everything else up to him.
I was actually robbed at gunpoint. Surprisingly I did not develop post-traumatic stress disorder from that. But I did develop PTSD from something else. Everyone is affected by things differently.
I was near the World Trade Center on 9/11 and I thought I was going to die. I was covered with debris and felt that I was buried. Because of this I am slightly claustrophobic.
A few months after 9/11 I started to get panic attacks. I didn’t know that’s what they were. I thought that I had inhaled debris and was having problems breathing. Once I discovered it was mental, I was ready to do battle.
During the months after 9/11, I was doing my pagan thing, so I used a chant from the Dune series about fear that helped to calm me completely and got rid of the panic attacks.
However, at that time, I didn’t know about the Jesus Prayer. I think it might help in this situation.
Anytime you start to feel troubled or you feel you cannot sleep, just say to yourself or in your head, “Lord Jesus Christ, Son of God, have mercy upon me, a sinner.” Each time you say it, imagine that our Lord is nearer and nearer to you. Do not just say it mechanically. So when you start to feel anxious or can’t breathe, or can’t sleep, repeat:
**Lord Jesus Christ, Son of God, have mercy upon me, a sinner. **
Lord, please help your child to get through this and give peace.