14 month old waking

[CarlyRose80]

Have a fairly normal 14 month old when it comes to routine etc. The problem I now have is he's began waking again in the night after having chicken pox and conjunctivitis. He's now fit and healthy again but is back to waking up around 11/12 I clock and only settling back to sleep after I give him milk!!! I know this sounds ridiculous at his age to be going backwards. This is now impacting on his day feeding. He wi have a bottle when he wakes up in his cot but now has no interest in breakfast and I now feel like I'm in a vicious circle. Need sleep so feed him at night but this clearly makes his less hungry in the morning. I have left him to cry it out but he goes on and on and I have 2 older children who are in bed. Please help. What do I do. I'm exhausted again and don't know how to swap this cycle around so he sleeps all night and is ready for breakfast?!! Tia xx