Destiny?

A few nights ago I was driving to the gym.  The gym I go to is about five minutes away from my house.  Along the way there is a stoplight where I was forced to stop behind two other cars, one of them a cop.  I began to think how disastrous it would have been had I rear ended the cop and it would have undoubtedly ruined my entire evening.  I then thought if one, or in this scenario I, made a mistake in rear ending that cop but I was able to turn back time however far I wanted with just one catch; once the aforementioned time was re-winded the individual turning back time was unable to remember that they had just gone back in time.  Would the same events occur throughout the time re-winded or would the events occur differently the second time around keeping in mind the individual has no recollection of the shift in time?  If your answer is "yes the events will always be the same," does that mean you believe in destiny?