Trauma guilt is incredibly common and can take many forms - blaming yourself for what happened, feeling guilty for surviving when others didn't, or believing you should have fought back or escaped. This guilt is often a way your mind tries to make sense of a senseless situation by giving you a sense of control, even if it's misplaced.
Remember that trauma is never your fault, regardless of the circumstances. Working with a trauma-informed therapist can help you process these feelings and develop self-compassion.