I've always wondered about this. Now, what if, in "reality" after every unit planck-time the universe forks itself N times based on all the things that could h

I've always wondered about this. Now, what if, in "reality" after every unit planck-time the universe forks itself N times based on all the things that could have happened but didn't? And if you went back in time, you go back to that particular fork and so that there is no way to ever detect your time travel? I realize this a fairly naive idea..