Scores take a week or two to arrive. You can always send parts earlier than others, and in fact it's recommended. If you can get in all of your materials well before the deadline you'll be better off. Your test date should be fine, but you won't have an opportunity to retake.
You can now choose which date's score to send (but they must all be sent from that date, no choosing sections!), instead of all of the ones you have taken. You could re-take the test and if you don't like your new scores you can just send the old ones.