Hey, how old are you? Since it is your first outbreak then I assume you are in your teens?
In that case I believe this may be a cause of hormonal changes in your body - very natural, and nothing big to worry about.
If this keeps evolving then you can look into some prescriptional drugs or antibiotics etc.

I am 19, almost 20. Is it possible that I have hormonal changes still occurring?

Yes hormonal acne can occur at any age - 20, 30 even 40 year old.
Either it's hormonal or it might be caused by some foods you are eating which trigger the acne. For example sugar, gluten, milk or some other food.