Glad the session was helpful. It sounds like it's anxiety. A couple of my friends have DDs with quite bad anxiety. They both went to a specialist clinic in Sydney that deals with preschoolers who have anxiety. Both found that with the extra help (particularly for them as parents) their girls were much, much better by school age. One of them virtually has no ongoing anxiety at all and waved Mum off without a tear starting school. If you saw where she was a couple of years previously you wouldn't have believed it was possible.

Not sure if that helps, but they both told me help early on seems to be most successful. Hugs.