when I was in year 9 on th eway to school my mum sister and I witnessed a man walk straight into traffic and get hit by a truck he was in front of us so we had to pass the body to pull over

to this day I can still see it, I spoke to the councellor at school and was encouraged to talk about my feelings which I presume would be much the same for a adult

I hope you DH feels better soon, talking seriously is the best remedy dont lock it away