don't forget - supply = demand, so as long as you feed, your body will make milk. Things change over time. But there is no such thing as your milk "just drying up". Breast refusal is almost always temporary. How often IS your baby feeding in 24 hours?
If your breasts are uncomfortably full, express to keep up your supply and keep your breasts soft and comfortable. But your body will keep making milk. In the second year of life many mums only feed once or twice a day (I realise your baby is younger) but they still make milk
Is there any chance she could be a bit unwell?