Is my essay bad enough to warrant me retaking the whole SAT?

So I just took the October SAT and I shocked myself and managed to get a 1520 (790 Math and 730 English). I really want to go to either MIT, Harvard, or Georgia Tech. However I got a (7/5/5) on my essay. Is this bad? How much will it hurt my chances? Is it worth retaking the whole SAT for? Thanks for reading. Any feedback is awesome.

Thanks for the feedback. That;s what I’ve been thinking. I feel my effort could be better spent in other areas.