Med School Students, Is It Possible For Me?

I am a 19 year old who one day dreams of becoming a doctor. I have always liked helping people, and have always found medicine and anatomy to be interesting and works of art. However, in high school I took some bad roads. I got involved in the wrong crowd and started partying and stopped caring about school. I did graduate with an intermediate diploma, but only a GPA of 2.5 However, my senior year I turned my life around. I ended up getting honor-roll all year and taking school really serious. Of course this did not make my GPA look any better, but it got me back on track. I then took 1 year off after high school to save some money. I am now going to go to a Comm. College to get an ociate's of General Studies. Afterwards I will transfer to IUSB, which is a smaller version of Indiana University, but still a great 4-year school. I think I could mantain a GPA of 3.5+ through college, but would that be good enough? I was never an academic honors student in high school.