Teens are complicated. There I said it. You can be sweet, sassy, thoughtful, and rude all in the matter of minutes. And that complexity is what makes working with you such a fun challenge.
I recently attended a training for Mental Health First Aid hosted by the Jefferson Center for Mental Health  that reminded me of how quickly the brain is changing between the ages of 12-20, and how those changes can affect mental health. There are some amazing resources out there for you and the adults in your life that can answer questions, spark discussion, and provide background information. One of my favorite sites is Teen Mental Health  which has information for teens, parents, and educators on everything from dealing with depression and anxiety to making new transitions in life, like starting colllege. The library also offers access to Teen Health and Wellness , an awesome database, that covers a variety of topics like grief and loss, food safety, and even dating.
So no matter what you're feeling, take a deep breath, talk, do a little research and know that your brain changes will slow down someday, but the way it functions will always be complicated (even as an adult).
*video provided by TeenMentalHealth.org