tabs are oestrogen free contraceptive
pills. It prevents ovulation.So If you are longing for pregnancy
you should stop taking it -after you finish current course.
Please get investigated for cause of miscarraige last time,mark for ovulation day &try for pregnancy. you have to take treatment &precautions to avoid abortion
after you conceive.
For all this purpose you need a Gynac's advice.Pl. get it.
Wish you all the best!