Do not wait to submit your app. Waiting to be verified until the major rush can really delay your application. There are plenty of people with NO score who submit the primary. It is true that you won't be "complete" until your score comes, but if you go on and verify your primary you can start getting secondaries 24 hours after your score comes out instead of 4-6 weeks later. If your first score is competitive you can submit your primary and secondary, then maybe your score will just help in terms of getting an interview. Again, all that is much faster than waiting.
Just indicate as mentioned above that you are planning to retake. In response to the other question: Not indicating that you are retaking won't matter to the med schools, just beware that they will be more likely to make a decision based on your submitted information and not revisit your file. So if you are going to retake, indicate that on your app to avoid a premature decision.