Lucky_13..I am so very sorry..I can relate to the images..at about 12, my friend from next door we came home from school and found his step father dead from a very violent suicide, and then I caught my mom soon after trying to kill herself...just wanted you to know why I can relate with the images being stuck replaying in your head..your Therapist is going to help walk you thru those dark places..the images and nightmares are apart of the PTSD...

having soothing things around you before you go to bed may help when you wake up panicked...I go to sleep with a soothing CD playing, and keep a night light on so when I jump awake, I am not in the dark.

I am so sorry Lucky_13 that you are enduring this, no one should have to keep the images of a violent death in their head...know that your in my deepest thoughts..take care..be gentle with yourself...give yourself time, this is very recent acute traumatic injury you are suffering thru..the nightmares are a symptom of that trauma..