My DD is a good feeder, roughly every 3 hours, but we use shields to BF. Except today she last fed at 11.30am after an hours feed on both boobs. She played for a bit and then wanted sleep. She's been in and out of sleep for nearly 5 hours now and when she stirred, I tried to feed her but she went mental and had to go back to sleep. She slept from 7pm til 2am last night and then up to feed at 6am. She's had loads of sleep. I feel a little concerned that she's gone so long during the day without feeding, but whenever i try when she'd tired she has a crying fit. Is this normal, is it a growth spurt, should I be worried? What should I do?