I am a bit confused about you being a junior but then talking about taking classes from '11 to '14, but anyway...I would make sure you are taking enough credits each semester to be counted as a full time student. I know that I need at least 12 to be considered one.
Also, (I am not sure about the truth about this but this is what I heard) med schools want to know you can handle hard classes at the same time, since that is what med school is going to be like. I don't think they would like the fact that you only took pretty much two classes each semester with research.