Infinite Possibilities

  Sometimes I wonder if I've chosen the right things for myself in life. I wonder how things could have gone, had I made other decisions, had I changed my mind about anything. My stubborn nature has helped propel my personality into being headstrong and confident. I don't normally think twice about doing something.
  It's only after I've made the decision, after the consequences have played out, only then do I look back and ask myself if I've made the right choice. Perhaps things would have played more smoothly had I changed just one aspect of an outcome, maybe things would have been easier. Then again, maybe things would just be harder. It's difficult to predict what might have happened.
  If you believe in an infinite universe possibility, you'd realize that you've already made every choice available to you. The problem with this idea is in confidence. If we are so sure we would have made the choice we did, is there a possibility that we wouldn't have? Does life experience mean nothing if we have every choice available no matter what we do? Admittedly, free will allows us to make any choice at any time, but with infinite universes, how can we know what we would have done?
  Decisions incredibly out-of-character for ourselves are very, very seldom done, and when they are, it's usually out of duress. How can there be universes existing on the basis that we do unbelievable things that we would normally never do? By extension, have we technically done everything we could possibly do, simply by living where there are infinite possibilities to do so? Are we all murderers because we've murdered in another universe? Are we always the best and worst of ourselves? Who are we, really? What is the "real" universe? And can we one day wake up, not recognizing ourselves, our location, or strange new habits we have, all because we've accidentally "jumped" into a new universe?
  Science, it seems, can be impossible.