I worry about that as well. My partner passed away and I have no children. I have health issues as well. I have researched NDE's and also, from some experiences since his death, I know that there is something beyond this earth life. It is my belief that the body is merely a human vessel for the "soul" and consciousness. I believe that consciousness is not of this earth. Although we experience consciousness in our bodies and minds, I think that consciousness is interconnected with all that is in the Universe. Although science has made great progress in explaining a lot about physics, biology, etc., we really DO NOT KNOW all that is. I think about the Universe and it is my belief that it is infinite. In studying the religions and spiritual thoughts on this planet, there are too many things that are the same in the stories. I suggest reading "Life after Life," by Raymond Moody. I also suggest reading and watching doctors and others discuss near death experiences. It has helped me. Please stay in touch. You are not alone.