But you might not.
It is possible you might arrive somewhere else being none the wiser of your recent past life. Imagine going to a 'place' without time, being just a spirit, no need to eat or sleep, living in perpetual light, never getting tired or suffering pain.
I think you'll have to decide whether to 'come back' once you see the alternative, if any. Personally, I've read many discarnate messages and they are all different. If the Buddhists are right and this world is maya or illusion, there are reports from dead souls saying that the next world is ALSO illusory, i.e. not real, but more real than this one.