if your retake happens by July of next year, you'll be fine. Submit AMCAS before then though; there's a place on the application where you can indicate that you have another score pending. complete your secondaries as they come in. that way schools will consider you as soon as your new score appears in August.
two caveats:
- it'll likely be a challenge to be working on AMCAS, secondaries, and MCAT prep all at the same time. fair warning.
- it's generally only worth it to retake if you can get your practice scores at least 5 points higher than your old score. otherwise you run the risk of getting a substantially similar or, god forbid, a lower one.
edit: i do think the score you have now is a solid one, well balanced and with your GPA would likely get you an MD acceptance somewhere, assuming everything else is in order etc