I know MN is generally not a very trans-supportive space but posting here in case anyone has any experience.
My 3yo DD says she's a boy and has done for as long as I can remember. She has an older brother she adores, and I wonder if it's more idolisation of him (she even says she wants us to have another baby now, as she's the age her brother was when she was born, so that she can "be a big brother") or if there's actually something that might be gender-diverse for her.
She says she wants a short haircut like her brother but when I show her images of haircuts (for boys or girls), she doesn't want a boy cut but will pick something like a bob. She plays equally with boys and girls at nursery and has a variety of play interests (loads of pretend play, duplo, puzzles, play doh, outdoor play, but also lots of caretaking of animals and dolls, giving them bottles, breastfeeding them), and she does also model what her big brother does (he is very typically "boy," cannons, sword fighting etc.). Her clothes are mixed, she wants some old clothes of her brothers but also wants lots of pink and purple unicorns, rainbows, glitter (although refuses anything with frills or hearts!)
Has anyone gone through this? I sort of suspect that when she starts reception she might have more peer pressure and the glow of her big brother will fade a bit, but I also want to support her and let her know she is loved regardless.