Oooohkay so that success was short-lived. For a few nights there she was tanking up (feeding at 6pm, 9.30pm, 11.30pm) and then doing a long stretch, but now she's still tanking up but not doing a long stretch! She still only feeds single sided during the day and I can't persuade her to take any more. At nights she will occasionally do a slightly longer stretch (~4hrs) but other times is waking up at silly times, i.e. like 2.5hrs after a feed.
WTH? I even tried giving the dummy back to extend those but she just takes it out her mouth and throws it out (unintentionally of course) of her cot and then I'm scrabbling around in the dark trying to find it. SO frustrating and I am SO tired.
So we are back to PUPD in the middle of the night. It is so difficult to think straight and remember what I am trying to achieve at 3am. I guess my tactic is to settle her back to sleep without feeding, when she wakes between midnight and 4am. Last night she fed at 11.30 and then woke up at 2am, took til 3.15 to go back to sleep and then woke again just 20 mins later (so I'm not really sure if she did actually go back to sleep). Blah.