You poor thing! My DS1 (who must be a similar age to your DD) went through a similar stage recently. He just went NUTS after dinner. He was completely out of control. I'm not 100% sure what it was, but I cut out any sugar after dinner (he was getting rewarded with a square of chocolate for finishing his dinner so I stopped that) and it seemed to make a difference.

Another theory was that he may have been overtired. He cut out day naps 6 months ago and I'm not sure if it was the transitional stage?

Do you have a nighttime ritual that you follow every night? Sometimes having a routine can help things run more smoothly, but sometimes it's just the child too!

I hope it is just a phase that passes soon for you all!