My 13 wo dd was sleeping at least 6 and often 8 hours a night by 8-9 weeks. However since 11 weeks she has been waking sometimes hourly, and going 3 hours max. She is also very difficult to settle after a feed and often cries for more or wants picking up. She was never like this from newborn until a couple of weeks ago. Thought at first it was a growth spurt, but seems to have lasted too long now. Weight gain is good, nappies fine, but could it be my supply dropping so she is still hungry?