What should a wife do if she thought her period had started because she saw a little blood, so she stopped praying, then the blood stopped, so she performed ablution and prayed, and this happened to her repeatedly? And is what she did correct?

Scholars differ regarding the minimum duration of menstruation. The minimum duration of menstruation, according to the majority of scholars, is one day and one night, contrary to the Maliki school. What the wife saw is not considered menstruation, and she must make up the prayers she missed, thinking it was menstruation.