Is this normal/usual for a child to regress/have a sort of seperation anxiety as they grow older?
DD has always been a happy, confident little girl, went to nursery from 9 months no problems (1 day a week, gradually increased til finally at 2.5 by 3years old). She has always been fine being left with friends overnight (her godparents) who don't 'babysit' her, rather she has 'sleepovers' and loves it, has had the odd party over the last few months where she has been left for 1 hour or so and been fine, gone to a friend's house same age as her for a couple of hours (friend from school) without us there, all been fine. Not particularly shy or clingy by nature generally.
She has a brother aged 15 months. Absolutely no signs of jealousy, in fact she is very generous with him, she is kind, and considerate, shares treats with him, thinks about him when we buy clothes etc (brother would like this one mama' that kind of thing). We both (DH and I) make sure she gets 1:1 attention. She has taken having a baby brother come into her life in her stride and loves him dearly, and tells him all the time. She has the odd moment where she gets annoyed with him or wants her own space and we do our best to give her that space (she has a quiet place he is not allowed to go).
DS is quite demanding. Up to 12 months breastfed a lot (before 9 months, breastfed LOTS), and not sleeping well, but gradually over the last few months this is improving and now it is much improved, more and more time share with the whole family.
But DD has recently become clingy with me. Very clingy. She often gets upset when DH takes her to bed. And even when she is fine with it, it is not that she loves him taking her, it is acceptance that he is doing it. She wants me to put her in the car, take her out, hold my hand, be there with me everywhere I go. She is less confident doing things without me right by her, she tells me she loves me all the time (nothing wrong with that obviously but it has stepped up) and clearly seems less secure in me being there for her for some reason. She has also started to talk a bit more like a baby, but on purpose almost saying stuff like 'mamam take DD, mamam hold dds' hand' (talking in third person). If take her to school (normally it is DH) she clings to me although she loves school, but not for DH, she goes off happily. She tells me she misses me all the time. She asks if I will ever leave her and asks her not to as she will miss me so much.
Tonight she went to school disco, for 1 hour. I did not realise it was only one hour til i got there, i took her and a friend of hers, and friends mum was collecting them. Going to leave them there as both ok with being left, and when friends mum brought her home she said DD had been upset most of the time she was there as she missed me. She was apparantly really upset. Last week we left her at a birthday part with another friend, and she cried. I know I should not have left her (now) but she has been fine with this before now.
There has been one or two occasions when she has missed me and got upset when at school, but they calmed her fine.
Sorry for the long post. I am worried that something is wrong, that I am doing something wrong. She is so much less confident than she used to be.