I have not gotten the cards yet, I'm assuming it will get here over Thanksgiving break. I will probably find out next Monday when I get back to school.
It's fine. King Arceus/dragonexpert didn't send his in either, so don't sweat it.
It happens. That's why my contests are round-to-round, so if you just forget about submitting an entry, you can just re-enter next time without consequence.