Will my score be flagged for review and cancelled?

So, I’m taking this upcoming December SAT. My last score was a 1280 but that was with no preparation.

I’ve currently just finished doing the entire College Panda Math book and Meltzer grammar book.

Lets say I get a score of 1500 or more, which is a 220+ point increase, are they going to cancel or flag my score because they suspect I cheated?

Also, I assume at the least my scores would be delayed, so by how many days do you think they would be “investigated” and delayed. This is very important because I’m a senior and most regular college applications lock on Jan 1st.

No its not that uncommon.

What a releif! Thanks!!!