Lots of sympathy from here . We had a horrible week like this with Miss E a couple of weeks ago - turns out she was having some sort of tired patch, I think it might have been a growth spurt and maybe she was too tired to eat enough? Anyway it settled down after a bit. She had some extra sleeps and I was careful to have lots of little times where I just sat down and gave her my full attention and then she was better again.

It also could be that you're feeling worn down yourself and she is noticing this and playing up as a result. I'm sure it will pass soon.