Hi has and welcome! You start to pump when you stop the bcp and add the herbs. The recommended pumps are the Medela Pump in Style and the Limerick PJ jr. I have seen them both on Ebay. How old is your baby? There are ways to get him back on the breast, especially once you have milk there. You could also try using a supplemental nurser like the lact-aid. You can do that now and a board certified LC could help you get him latched with that. The website for lact-aid is
www.lact-aid.comI have a protocol Lenore gave me for transitioning to breast slowly. If you give me your email I will send it to you.