Thanks for your comments.
ridofme: I am a Communications major, so my only experience with math in school is through several research courses I took, which is explained in my application. Additionally, i am taking an economics course with the university of toronto, and some private tutoring in calculus. What i´m arguing in my personal statement is that "my GRE quant score does not adequately reflect my potential". Rather than giving specifics on that score (didn´t want it to sound like i was excusing myself), Im sort of saying: "Yes, i got have this score but i also have these things that make me a competitive candidate". Hope it works :/
PS PHDreams: No applying to Harvard. To be honest, given my quant score I didn´t think I would make the cut so... :/