hi jodie, my little girl is 14 weeks tomorrow and she is still not sleeping through, she is also erratic with her sleeping pattern - sometimes she can go to bed at 7pm and not wake till 3am, other times like last night she goes to bed at 7pm, dreamfeed at 10pm and then she woke for a feed at 1am and 4am but she didnt take much milk so i think it was more out of habit, just like you. I really need a good nights sleep - my son didnt sleep through until 4 months so i keep thinking, just a couple more weeks but he was a lot heavier than my daughter, she is only around 11lbs and only takes 5oz 5 x per day if i am lucky.
Let me know if you have any more luck or if you want to chat, let me know, i am here for you and know what you are going through, love a sleep deprived mummy!! x