If there's any doubt in your mind, take a year off. It's only going to work in your favor.
If you're not happy with your score, don't apply b/c you'll only end up disappointed with your options.
And if you're JUST NOW thinking about retaking, you're not going to get the jump you're aiming for.
Take a year off, spend the next 6 months prepping, hire a private tutor if you can, and try agian later.
Just y $.02.