Is blood that comes down in small quantities, ten days after the end of the menstrual period and not at its usual time, due to the use of birth control pills, considered menstrual blood that prevents prayer and marital intimacy, especially with the wife's desire to make up missed prayers and fasting?

The maximum duration for menstruation is fifteen days. If the blood that returns after a period of cessation, combined with the blood that preceded it and the period of purity in between, exceeds fifteen days, then it is considered istihadah (non-menstrual vaginal bleeding) and not hayd (menstruation). In this case, the woman must purify herself, perform ablution (wudu'), pray, fast, and do all that women in a state of purity do. It is also permissible for her husband to have intercourse with her.