I understand exactly what your talking about. You are not crazy and you are not alone. You will have nightmares, you will have flashbacks. Look into PTSD symptoms. I also have hallucinations.

Are you in therapy? If your not you may want to get a therapist. You need to process this with a professional. The more you process it, the easier it gets. Although, there is no cure for PTSD.

PM me anytime.