I took mine on the eighth and it was just approved yesterday. I think they wouldn't tell you if it was flagged but rather if there was a problem warranting cancellation they would just tell you it's cancelled.
I did my writing the next day after the test and my results were approved within 10 days. As long as it doesn't get flagged, I've seen people said they were approved within couple of days.
You can certainly take it after but your LSAT score won't be released until the WS is approved. My advice is to take it ASAP. It isn't anything you need to prepare for. Might as well get it done so it doesn't hold up your score.
I usually drink a glass of wine during each practice test... I plan on drinking a glass right before the real exam just to loosen up. Everyone has what works for them but try it out! it might just help!
I did not rip my scratch paper (I didn't use it at all, not sure if that matters or not) and was worried my ID picture would be too blurry, however I received my approved writing sample in 4 days.
So sorry you had to go through this. However if it’s any consolation, I did my writing sample 11/23 and it was approved today! (11/25). So you might not have to wait till Christmas to see your score :)