Girls hi ?❤️ My daughter is a month old now and my nipples just won't …

Girls hi ?❤️ My daughter is a month old now and my nipples just won't heal. From cracks they turned into big wounds, they seem like they want to live but when I feed her she opens them again, when I apply and the wounds tear apart very painfully, but not when feeding. The doctor from lactation called, she showed me how to apply, I do everything the same way. I don't understand why the wounds aren't healing and when I apply they tear open, and I smear cream on it, and I don't know what to do anymore ??‍♀️Painful when applying, the wounds tear open again ?