Sometimes traumatic events cannot be processed by your brain and circles constantly, A person when they sleep at night their brain processes and files days events during that time, with trauma its hard to allow the process to take place. They have a therapy which mimics the REM sleep stage with a light stick which you follow lights left to right (or if like me I couldn't concentrate due to eye strain taking my mind off it) there is also vibrating pebbles you hold n your hands tat vibrate left to right. Its called EMDR "eye movement desensitization and reprocessing" It would be up to the counsellor / physch if they believe a therapy like that would help you as I wont lie to you, its hard, you are shattered after it and you have to relive the trauma n a controlled environment for it to work.