It has been said that the flutter of the wings of a butterfly can provoke a typhoon half the world away. So, minor changes can lead to a snowball effect and create whole new situations, and that´s why, if given the opportunity, I wouldn’t change my past.
Firstly, if you changed something in your past because something in the present troubles you, there´s almost no probability that you´d create a new perfect situation, because this change would trigger something you might want to change again, or it could just lead you to skip an important event in your life such as finding your significant other half or getting something you wanted.
So, there´s only one prediction we can make about life: it is unpredictable and we should try and see the beauty of this chaos instead of wanting to control it.
María M. A.