* Apply to college or university: Your age won't hinder your application.
* Enter the workforce: You're legally able to work.
* Join the military: Age limits vary by branch but are generally well above 19.
* Obtain a driver's license (if you don't already have one): The age requirements are determined by your state or country.
The only potential "consequences" are social or perceived ones, and these are often unfounded:
* Some might make assumptions about your academic abilities: This is a prejudice; graduating later doesn't necessarily mean you're less intelligent or capable.
* You might feel a bit older than your peers in college: This is true, but many college students have a wide range of ages.
In short, graduating high school at 19 is perfectly normal and opens the same doors as graduating at a younger age. Focus on your accomplishments and future goals, not on the age at which you achieved this milestone.