The unpredictable happens and it's usually outside of your own control. Resist the urge to take it as a sign that you are on the wrong course and instead, find the good in the unexpected. A streak of bad weather keeps you from your morning run?
Try the new gym in your town. A promotion brings added stressors to your life? Reward yourself by allocating some of that newfound income to relaxation and self care. A detour is just a new way to get there.