I feel your pain Nate.
I had a two year romance with PTSD induced insomnia that started around six months after the completion of my last tour of duty. I'd average half an hour of sleep every other day, and even then the circumstances in which I'd wake up in kept me well afraid of sleeping again. My brain would fire off warning signals to my body whenever sleep crept too close, and adrenalin and heart rate would shoot to the roof. When I did doze off out of exhaustion, I'd wake up in sheer terror and usually vomit, in a wicked state where my body was awake but my mind wouldn't pull the veil back, and so it was like waking from a bad nightmare only to discover that it is in fact really happening, only that in reality I was on my bedroom floor.
Like a very bad trip that repeatedly takes you through your worst moments and manages to convince you that it is in fact real. What was worse was having to explain it to family, and feeling that you've crossed the apeshit line.
I still average only 3 hours of sleep a night, but the other symptoms only rarely rear their head, and after sleeping 3 hours throughout service and having a newborn son, I figure I've grown accustomed to dealing with it. And coffee addiction helps.