You want honesty?
I have.
I came home from my third combat deployment to Afghanistan with a bad case of PTSD. I'd probably had it since my first deployment (Iraq, Battle of Fallujah, nasty, nasty stuff) but wasn't really aware of it. My third trip to Afghanistan was really bad. Intense fighting. Three from my platoon KIA. News of a childhood friend In the Army being KIA at the same time I was there. Intense questioning of why we were there. General numbness.
I came home, got out of the Corps, and the PTSD took over immediately. I was never suicidal, but I had just about every other symptom.
Another war friend also suffering was the first to offer heroin to me. It was absolutely beautiful. I hadn't been that calm or at peace in years. I only allowed myself to do a very little bit. But I did it daily, and it was only a couple weeks before I realized the amount I was taking wasn't getting me the same feelings and I NEEDED more.
I immediately realized I was becoming addicted, and knew how bad that could be. I checked myself into a mental health facility the got me clean from heroin, and substantially helped my PTSD.
I've been to some of the darkest corners of the universe, but seeing that I can choose to live in the light is what keeps me going.