Belief in an Afterlife seems rational

There is no way to "know for sure' unless you have passed away and then been brought back, i was resuscitated 4 times in a row in an accidental over dose when i was 14 years old. I did see a light seemingly at the end of a tunnel, then everything went black when i presumably was revived. I do not know what was over there near or around the light, i am not even sure it was actually a light at all but maybe mind tricks. I can never know for sure because i can not replicate that scenario. I do think that whatever happens to us after death happens the same to each individual. Regardless of ones nationality or religious preferences, i do however think there may be reincarnation, i know i have owned some animals that had taken to and become quite partial to certain objects, sounds, places or things. It makes you wonder are we all just dying and coming back as something else? Are we passing on then being reborn as a abby only to start the cycle of life all over again? What if there are the same 30 billion people on the planet never to raise in population numbers because we die and come back as another?