Is the blood that appeared prematurely, was black and very scant, and was not accompanied by severe pain or the usual vomiting, considered menstrual blood that necessitates abandoning prayer?

If a woman sees blood after fifteen days from her previous period of purity, then it is menstrual blood, and its rulings apply to it. The blackness of the blood is an indication that it is menstruation, as the Prophet, peace and blessings be upon him, said: "If it is menstrual blood, then it is black blood that is recognizable." The scantiness of the blood does not exclude it from being menstruation. However, if the blood returns before fifteen days of purity have passed, then it has a different ruling.