4 year old behaviour!

God I’m exhausted with my daughter at the minute. Since she turned four its like she has become a completely different kid. She was so polite, sweet and caring and now she is demanding, constantly trying to tell me and her dad ‘no’ and challenges EVERYTHING we say. Plus bedtime regression has become a thing. And oh god, the tantrums!!

Not to mention I’m 27 weeks pregnant, so the stress isn’t helping me there.

Is this normal behaviour? She is my first so I’m still new to all these stages in a child’s life.