Since it has been going on for such a long time, I wonder if you are a prop for her in the night or if there is another cause rather than routine
. You say she is doing 9 hours at night - what is her 'routine' at the mo? Could you post the last few days for us?
Also, can I ask what was her health issue - is it resolved now? Does she wake at the same times and what does she do when she wakes? Any history of reflux?
My dd is still not sttn either (turning 2 this week) so I empathise
.