Some memories do not feel like memories.
They show up in your body. In your sleep. In the way your chest tightens when someone raises their voice. In the way you avoid certain roads, conversations, smells, people, or places. You may know, logically, that the traumatic event is over, but your nervous system may still react as if it is happening right now.
That is one of the painful parts of trauma and post traumatic stress disorder. The past can keep interrupting the present.
EMDR therapy for trauma and PTSD was created to help with this kind of stuckness.