One of the top books on past lives and near death experiences is Raymond Moody's "Life after Life".
This is my third blog on the afterlife. There will be at least one more. This is not a subject you can learn in five minutes.
Both Christianity and Scientology embrace the principle of "The Way Out Is The Way Through" towards loss, suffering and pain on planet Earth. Jesus handled it on the cross on a massive cosmic level and Scientolgy handles it on a personal level.
From a medical standpoint, loss, pain and suffering is usually handled with painkillers, and psychiatric drugs.
The above is part of a materialistic belief system that's suppose to make all your troubles go away. Even death to many of these "one life experts" is a way of avoiding the problems of life by going unconsciousness, no accountability, no brain, no pain.
The loss of my wife and the pain of her death is very real to me. We all have to face experiences like that at some time in our life. Repressing memories, running away doesn't do any good.
One can't run away from painful experiences through death. Suicide isn't the way out.
At some point, we have to come to terms about what we've learned in life and whether we've learned anything from our mistakes. "There is nothing hidden that won't be disclosed or anything made secret that won't come to light".