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Re repressed memories: Thank you for these additional observations. I don't think there is any doubt, either in the psychological community or among many observant people, (1) that we do sometimes deal with some unpleasant, traumatic experiences by suppressing them from active memory, and (2) that these now-forgotten memories cause unfortunate behaviours that we don't understand, and (3) that sometimes those suppressed memories flood back, often suddenly and explosively, into our consciousness, and (4) that sometimes we then recognize these repressed memories as the causes to the behaviour we previously did not understand. 

Further, in psychoanalysis under the guidance of a therapist, such memories regularly first surface vaguely in symbolic form in our dreams; and then with time the underlying memories themselves emerge. In psychoanalytic theory, the idea is that we repress what we can't deal with, and our unconscious releases the memories when we are ready to dealt with them.