I'll try to be brief - dd is 5 months old. We have always tried to put her in her cot awake at bedtime and for naps as we had lots of sleep trouble with her older sister so wanted her to self soothe early on. She has been great, she settles quickly each time we put her down. I bf until 4 months, but for last month have used formula, only bf at night if/when she wakes. She goes down around 6:30-7 after her last bottle and HAD been sleeping till 2-3am before waking for a feed. Sometimes she even went through til 5am. But for the last few nights she has been waking earlier and earlier and won't settle until she is fed, despite me starting to give her a dream feed around 11pm. Last night she woke at 1 (2hrs after feed) and I tried to leave her to see if she'd settle (controlled crying style) but after 30 mins she was still going strong and I gave in. Tonight she has just awoken at 10:30 pm before I even had chance for dream feed! Have given bottle now and she has gone back off to sleep.
I know she's not hungry, and I also know she is capable of falling asleep by herself, so why is she waking up??! Any help or advice would be very gratefully received!!