Why?

So here I am. I'm just 17 year old girl at that stage in her life where many decisions are to be made, one girl asking herself many questions and just trying to find the answer to life in general. From an early age I always felt pressured into deciding what I wanted to do with my life, where I wanted to go? Now before I start babbling on my parents have never pressured me, they have always been supportive and I am very privileged to have that support as many people do not. All around us there are many pressures forced upon us by society, by our friends, our teachers and I am definitely feeling those pressures at the moment. I have so many fabulous friends who are all stunning and very intelligent. As a person in a group with friends who can easily get a high grade, it sucks. I work hard, I get the grades, but not the ones I hope to get and some of my friends don't respect that as if they got my grade, which is over average, they would say they had done badly. Yes everyone is different, but when you have 6 out of your 10 closest friends doing medical science with you next year and they are more intelligent then you, it puts you down a little. This brings me to my next point: UNIVERSITY. I am very passionate about a lot of things, singing, acting and science. As I said before, I am at that stage where I have to make so many decisions in life and one question constantly stuck on replay in my thoughts is, 'What will my future be like?'. I have been singing and an over dramatic child for a long time! I have my grade 8 in Trinity Drama exams and I just love to play the piano whenever I get the chance, but it wasn't until high school that I discovered the wonders of science. Up until now I have been set on doing physiotherapy and then travelling around Europe but I have this annoying feeling in my gut that makes me question whether I have made the correct decision. Should I follow the world of music? Or should I follow the world of science? Maybe I should just travel, but then I know I wouldn't come back. Why are there so many questions and decisions we force on ourselves everyday.