Yep, get Pinky's book..... I would avoid T.Hall if I was you. (my opinion anyway!).

3mths is a huge developmental stage for babies too and they can start feeding alot more and go off their sleep, all totally normal but YES exhausting hey!! this too shall pass.... definitely try to increase her feeds during the day time and let her cluster feed of an evening say between 5pm and 9pm if that's what she wants.... you might find she sleeps a bit better after that.... GL!