Please keep us updated. With how big he is, I would assume that whatever's going on must be recent. That said, I hope that means that the damage is minimal or not permanent. Your in my thoughts and I'm sending good healthy baby vibes your way!!!!
please don't hesitate to check out the EP'ers support group in the breastfeeding challenges section, pumping is so hard and there is a lot of good advice in there to establish and keep up your supply. take care of yourself.