Answer:
The experiences we are having today were likely shaped by the past events you have been through. Events in your childhood or early adulthood have shaped the way you think, act, and interact with people close to you. ... Our past, present, and future are intimately linked by our memories.
I think you personally need to do this yourself. Sorry I don’t know
I believe the answer is: Hypnotic age regression
Hypnotic age regression's result would be extremely determined by the relaxation state of the patient and the willingness of the patient to cooperate with the hypnosis.
With this method, we could even obtain pieces of information that is not consciously remembered by the patient but still lie dormant in his/her subconscious