I hope to get into medical school after getting my B.S. in biology from UC Davis. I'm afraid to fail

The fear of failure as you start college is perfectly normal. If only your senior self could come back in time and tell you it will be ok! You probably felt the same way when you started high school, and you did great! Your track record shows you are well-equipped with the intelligence and work ethic needed to get through college successfully. The other freshmen you meet will likely feel the same way you do. Your abilities and confidence will grow with each course you take. Maybe one day you will find yourself mentoring incoming freshmen to ease their way into college life.

http://www.nytimes.com/2016/08/21/opinion/sunday/conquering-the-freshman-fear-of-failure.html?_r=0