Can anyone give advice please? MV (11 mnths) has just had 4 weeks of successive illnesses (sickness, flu & chest infection) that have disrupted her (previously good) sleeping patterns - and now cries like mad in the night, will not be put down after being settled, and continues to cry when left.... even though I can tell she's exhausted. its goes on for hours.
Do we have to take a hard line, and not go in to her?