Taking pills to prevent period in the last ten days of Ramadaan

How can she make use of her time when she is cooking in Ramadaan?

Can a woman who is experiencing non-menstrual vaginal bleeding (istihaadah) fast?

Some drops come out of her and she is pregnant. Should she stop praying?

She saw the tuhr then she had some discharge – what should she do?

If the bleeding lasts for more than 15 days is it still regarded as menstruation, and can she fast?