Try meditating and see if some of these same themes come up.
If you want to delve deeper into the idea of finding out your past lives, you can try past life regression therapy. For example, "If you are interested in past life regression, all you have to do is consider your fears and interests. Your fears can represent bad experiences from past lives, and your interests could represent positive experiences from past lives. For instance, if there are certain types of movies or books you have enjoyed since you were a small child, then perhaps you were once in a similar situation and setting as the characters in those stories."
I found information on it from this article:
http://www.quantumjumping.com/articles/past-life/past-life-regression-therapy/