It's a cycle where you may outgrow caring over it which makes it easier and lessens its severity, you care about other things and so does everyone else.   We are wired to worry over things and overthink everything.  You can set a goal to change that because worrying and getting in our own heads only makes it worse so why waste the time and energy.  Enjoy life and remember how much fun you can have either way.  You can still play sports, do homework, enjoy games or movies and more.  I do sales and estimates, when I get stuck on an area or word, my body and mind trigger a little fear and worry over it, a quick wonder what they are thinking after I continue on but as we continue on anyway, they can care less because they're wired to think about themselves.  The worst is in our own heads.  You can wait with time and you get used to everything anyway including the broading you may feel like doing (everyone falls into it, it's a human condition, its like we get bored and addicted to worrying over nothingness) or you can practice e not dwelling on it.  What ever happens, happens, not like worrying makes it any easier.  It's like a thumb trap, the more we care, the tighter it gets, the less we care, the faster and easier it loosens up over time.  Just forgive the difficulties now and then and think of the more important things in life.  Your body, your education, and the fun you can have either way.  Everyone's afraid of things, stutter or no stutter, the worst is always in our head, with anything.  Don't take for granted your health and more.  Your world is what you think of it.  It's what we replay in our minds.  Choose not to replay negativity.