How old is dd?
I stopped feeding ds1 at 3, by offering him a choice to carry on feeding if he wanted, or to choose a "big boy toy" once he could go to sleep without a feed. He tried a couple of times, then decided to choose a present, but then he was old enough to make that choice. I also had a box of minimilk in the fridge. They were great for distraction during the daytime, if he needed a 5 minute sit down. We then progressed off them and onto a drink and some fruit etc.
I stopped feeding ds2 at night at 2, explaining that once it was dark there would be no nursing, but that he could have some in the morning. However, that was in autumn, when it was dark enough. Perhaps you could try the same, once the curtains are closed in the bedroom - no, it's sleep time now. Milk in the morning.
I had to send in dh several times the first night, to a) offer water (indignantly refused) b) repeat the mantra - mum's asleep now. It's sleep time. Milk in the morning and c) to reassure him and tuck him back in. It took 3 nights but it worked, and we managed the odd daytime feed to keep us going.
(Apparently your milk will change as you approach birth again - some go off the new flavour, others keep feeding, if you have the energy)
HTH