Hi, so I’ve been on the mini pill (progesterone only) for around a year and a half now, and I’ve had very few problems with it (apart from when Ive missed a few doses and started my period but that’s my fault). But all of a sudden I’ve started having black discharge/blood and cramping, even though I’m taking my pill at exactly the same time everyday. The bleeding/discharge doesn’t stop and I know I’m not pregnant so I’m really confused as to what’s wrong. Help?