Retake Math II for Harvard?

Hello. So I applied early with a 34C but made the stupid choice of sending my SAT II scores for free without actually seeing them. I did pretty well on two of the three tests I took but COMPLETELY bombed Math II. Math was also my lowest section on the ACT (all the others were 35/36s). I understand that Harvard only requires two SAT IIs, but will they hold my Math II score against me? Should I retake in Jan knowing that I already have pretty good scores (700+) in the other two subject tests? I was deferred, if that helps. Thanks.