AM I LOSING MY EDGE

So today after being late to an class for the God knows number of times the professor requested that I stay after class for a moment.  He started off the coversation by asking me am I sure that the medical profession is what I want to do with my life. After thinking for a moment I replied yes.  He expressed  his concern over my coming late (all be it 3-5 minutes) and just a lack of passion overall.  I love the medical field it has been my dream to work in this field since the age of 10. It's just that the work can at times be repetitive and boring. Its always a challenge but you can only do something so many times before  it loses its appeal with you.  There are those things like patient exams and gross anatomy labs that never lose their appeal with me and thats partially due to the fact that there is a sense of randomness to them that I enjoy. So I guess im just going to have to find a way to get my edge back in the class room/less glamourous aspects of the medical profession. F.Y.I im still passing the class all classes for that matter and maintaining a 3.4 g.p.a. Later peoples.