I've been pumping 3 times a day for the past 2 months with no issues. Now, for the past week, my nipples have been painfully sore, bleeding and there's broken blood vessels. I don't know what's happened. Do your nipples grow after pumping awhile? I thought maybe that's what happened, so I bought a bigger sized breastsheild yesterday, but I think it's too big, but I'm not sure. I don't want my milk supply to go down! Please help!!!