When should a woman who broke her fast in Ramadan, fearing for her child due to breastfeeding, make up the days she missed?

A pregnant or breastfeeding woman must fast and is not permitted to break her fast unless she fears harm for herself, her fetus, or her nursing child. In such a case, she must make up the days after Ramadan. If the fear for the breastfeeding woman persists until the next Ramadan, she only needs to make up the days. However, if she was able to make up the days but failed to do so before the next Ramadan, she must make up the days and feed a poor person for each day.