I have a 3.5yo DD.
Since 8m she's called me mama or some other variant.
I love her with my whole heart. She's my world.
But sometimes when I'm really tired or feeling odd, she'll call me "mummy" and I'll think, "who, me?. Holy shit, yeah. I'm a mum!"
It still baffles me sometimes that I'm a mum, I'm responsible for this little human.
She was planned and very very wanted before anyone thinks any different