Could I become a doctor with my grades?

It takes more then grades to become a doctor. you need hard work, sacrifice and people skills as well as being self motivated to learn and keep looking things up. If you can do this, then apply to med school. If you can't imagine studying the rest of your life, or reading journal articles everyday in order to better take care of people, then don't waste your time, you'll get sued in the first 5 years and will have to quit.