I am allowed to change my mind. You are allowed to change your mind. We are allowed to change our minds. They are allowed to change their minds.
It's the most powerful permission we've been granted--to change our minds, to change our definition of ourselves, to change our passions, to change what it is we find important. And we can change as often as we wish--every day if that's what it takes. Because the most important thing is for you to be content with yourself.
But here's the trick and the hardest thing--love yourself as you are, even in the midst of change. Otherwise desperation, panic, and hatred will find you drawing hasty conclusions and taking paths that may look clear and easy, but bog you down in their sameness or, worse, leave you exposed and without shelter. There is no shame in stopping, turning around, and heading back the way you came, then choosing a new direction.