What must a woman do if she performed previous prayers without ablution due to her ignorance that vaginal discharge necessitates ablution? Must she repeat these prayers, the number or time of which she does not know? Must clothes be cleaned from normal vaginal discharge? And what should she do if this discharge is frequent but not continuous?

If you are not certain that you prayed after the discharge without ablution, then there is nothing upon you, for the default assumption is the validity of the prayer, and doubt after completing an act of worship does not affect it. However, if you are certain that you prayed some prayers without ablution due to this discharge, then there is a difference of opinion regarding the obligation of repeating them. It is not obligatory to purify the body or clothes from this ordinary discharge, for the preponderant opinion is that it is pure.