Terrible twos? Pssssh

So it seems my daughter, who was 3 in June, completely skipped the 'terrible twos' and has full force with being a 'threenager' anyone else's?! 😑 about 70% of the time she doesn't listen or do what she's told, she cries (literally screams like a baby) when she doesn't get her own way, won't share with other children, she's started this thing where she runs away when we're out. I'm trying to raise a well behaved little girl but it seems impossible when she just doesn't listen 😢 she's very polite, knows to say please & thank you, but acts like such a spoilt brat.. I'm dreading her baby sister being born in November 😶😶