Most people will say you are too young to know for sure what you want to do with the rest of your life, but honestly I have been interested in EM since middle school. I was always a kid who loved the sciences and when I was about 11 years old my Dad became a volunteer EMT. This was in '79 and EMS was just beginning. I remember reading his old Brady EMT text with fascination and I took an EMT class myself in high school. My Dad and I rode together for many years. He is now retired, but my husband also volunteers so it continues to be a family affair.
I went to college and majored in Biomedical Engineering, met my husband, and decided that I wanted to work as an engineer. My undergrad grades weren't too good due to a chronic illness I had during my undergrad years and I felt engineering would be a more compatible career to have when we had children. Many years later after a career as a clinical engineer and being a stay-at-home mom, here I am in med school. For me the desire to be a doctor never left me and I have never been happier.
Some advice for high school and beyond:
Your priorities should always be in this order:
1) your own health and happiness
2) the health and happiness of your family and loved ones
3) school and all the other stuff that you need to excel in to achieve your dreams
Work hard in school, but have some fun. Lots of fun!
Take an EMT class when you are old enough and find a place to volunteer. Teching on an ambulance is a great first exposure to patients and EM.
Please have some more fun!
Take things one step at a time... don't try to graduate high school early or rush through college. Enjoy the journey.
BTW: it occured to me while writing this post that my oldest daughter is only 6 years only than you. Now I feel really old!