You're doing all the good things to stop lactation but at the end of the day that blocked duct is going to have to get unblocked otherwise you'll be well on your way to more than just mastitis - sorry to bear such bad news - hot showers and compresses to get that milk down and out, massage and just a little pumping to get rid of the block - or you could ask your child just to help you unplug - I did and ds was delighted to help out but understood that it was just to help because mummy was sore - you'll be amazed at how understanding the little ones can be!
these are other homeopathic medications that can be used to stop lactation:
Ricinus 30 CH - normally in unidose - or certainly here in France they are but you can ask your pharmacist/homeopath
Lac Caninum 30 CH
if there is slight engorgement or tension in the breast Apis 9CH and Bryonia 9 CH - 5 grains to be taken morning and night until you are no longer engorged - or have a tight feeling - hope that this helps, but please in any case do not delay in getting rid of the blocked duct it must be dealt with immediately! Just had a thought that maybe I'm not allowed to post the homeopathic remedies - hope that it's ok moderators!!??