My DD2 was and at times, still is like this, two years on. Not sure if it is practical for you, but when she was your DD's age i used to physically remove myself from the house. I'd go have a coffee or whatever and DH would give her her milk with zero drama. It was a case of out of sight out of mind and DH would always say how 'easy' she was when I wasn't around - not great for my mummy self esteem but at least i know that she can and will settle without me.