As always, it seems that just as I am reaching my breaking point, things get better. DD seems to be feeling better, although she still has her off days and I think the teething monster is still lurking. 2 weeks without vomiting is a record for us in recent months, so fingers crossed there.
Three consecutive days of wake to sleep worked to postpone her wake until at least 5:55 (I tickled her 45 min before her expected wake up), and since she has improved further to wake after 6:30. Unfortunately she is not sleeping much more, as she is really fighting going down in the evening and taking relatively short naps (about 1:20).
She seems to be extremely wound up at bed time, so we are going to try going back to reading stories in a chair with Mum or Dad rather than reading on her big girl bed - as for the past few nights all she wants to do is run around the bed, jump off, climb up and repeat. Again, I will keep you all posted.