Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh

You are free of menses only when your bleeding has completely stopped, and you see the white discharge, following your regular pattern.

However, after seeing the white discharge if you do experience pinkish or brownish discharges, you need not worry. Umm Atiyyah, the Prophet’s companion, said, “During the Prophet’s time, we never used to pay attention to the pinkish or brownish discharges that followed the expiry of menses.”  (Al-Bukhari and others)

All the above, however, is conditional on the fact that your menses period did not exceed fifteen days. For bleeding after fifteen days cannot be reckoned as menses; instead, you should consider it as due to istihadhah (abnormal bleeding).

In the case of istihadhah, you need to pray after having taken a full bath at the end of your period; then you wash your private and make wudhu before each prayer. Washing and wudhu should only be done immediately before each prayer.

Almighty Allah knows best.