What I need to know is how a through-and-through gunshot wound would heal. I had it go through the ribcage and not injure any of the digestive organs, going through either the spleen or liver, and breaking two ribs, either just in front, or front and back. I was able to find a good bit about the biology/medicine of how that wound would and should heal, but I haven't been able to find out how it would feel while it was healing, and also how long it would take to heal.
Googled: Gunshot wound healing, through and through gunshot wound, broken ribs, broken rib healing, splenic rupture, traumatic liver injury, and other permutations and combinations of similar terms.
The other question is about the psychological recovery. The injured character develops PTSD, and has trouble talking to adult men other than B after the incident (both characters are adult men, but A is younger than B by almost twenty years). I'm writing most of that from personal experience, but what I don't know and haven't been able to find out is what it's like to experience/observe a flashback that has episodic content--not simply a rush of emotions/feelings originating from the traumatic incident.
Googled: Flashback, PTSD, PTSD symptoms