This sounds very unpleasant:

Hyperthymesia is extremely unique neurological condition in which people used to remember practically every detail of their life. They seem to recall every single event that has happened to their lives. It is curious that these people spend a large amount of time whilst reminding the past events. You may not remember as to what you were doing in the same day last week, what you ate, what you wore, whom did you meet, but people having hyperthymesia are capable to tell you precisely all these. It appears as if there is a recording device in the brain where everything has been amazingly stored. However, their memory is only limited to their own life-events which is why it is also called Highly Superior Autobiographical Memory (HSAM) or Hyperthymesia Syndrome.

While condition of hyperthymesia enables you to remember almost anything, it leaves some harmful effects on the thinking ability. AJ is one such example as she suffers from major disruption due to the flood of memories. She is often exhausted by the uncontrollable stream of memories and for her it is simply a burden. It seems as if she gets lost in the world of remembering things. As it turns out, AJ lives in her past and never bothers too much about future or even present life.