What does it mean when there is a period of your life for which you have no memories? Relevant background: the period is about a year and a half of my childhood (age 4-5) shortly after a traumatic event. I have memories of events from both before and after, but this one period is like a hole.
Amnesia of traumatic events is quite common, especially of those that occurred in childhood. The reasons for that are unclear. What you describe is a normal reaction to childhood trauma.