Oh wow, I'd go back to birth? I'd probably cry, forget everything (unless this journal magically made it to the other side lol) and start back from the beginning. Now, if it was all matrix style, where I'm still the same age, but blind to the alternate reality. That might be hard to take. I'd probably want to see a doctor to make sure I'm not delusional or anything. In a third hypothetical, where I wake up and life is much better. Where government works in the interest of what is best for everyone or at least not just the elite and the very poor. Maybe a system without money, where people are motivated for the greater good. I'd even be okay if I was the same, if the world was better for everyone. Ideally everyone would have more than the basics and is treated fairly.