My 11 day old DD has been cluster feeding (I think) and tonight has been particularly bad - she's been permanently hungry since about 4pm and hasn't slept at all. I'm sure she's not getting any more milk out of me as she doesn't seem satisfied and starts head bobbing and finger sucking while my DP burps her. Help! What can I do? She needs to sleep (as do I!) but she won't stop wanting food!