Dd just turned 4 and almost overnight has become a whiney little thing. She has always been so resilient, nursery key workers used to say she bounces, because she would fall over and get straight back up. Now, the slightest knock and she needs hugs and kisses. She's also regressed in terms of sharing toys, and cries whenever she is required to share or someone is playing with a toy that's hers, even when she's not playing with it. I'm not sure if it's a genuine need for reassurance, attention seeking or something else. I am reluctant to not give her comfort when she needs it but most of the time she's not hurt, but will cry for cuddles.
What happened to my resilient little girl? And what can I do to reintroduce some resilience?