Verified answer

Some women are able to take a low dose oral contraceptive while breastfeeding, and some are not. If you're concerned about your milk supply, you could get fitted for a diaphragm or cervical cap, or you could use condoms until you've finished breastfeeding. These might also be better options if you plan to get pregnant with another child within the next 2 years.

Hope to regularise your period further. It may be helpful to him for your treatment attentively.