Is my prayer valid after I found a dry yellow spot on the sixth day and two small spots on the seventh day after performing ghusl following menstruation?

Purity from menstruation is achieved by one of two signs: complete dryness or the white discharge. If a woman sees yellowish discharge after having achieved purity, her prayer is valid, based on the saying of Umm Atiyyah: "We did not consider brownish or yellowish discharge after purity to be anything." However, if the yellowish discharge is connected to menstruation before purity is achieved, then it is considered part of the menses.