My DS is 7 weeks old and I breastfeed him every 2 hours, even at night (he doesn't sleep through yet). Each session he's at my breasts for 30 - 45 mins which leaves me with a little over an hour until the next feeding. I want to build some EBM stock for emergency but is it too early to start now? I tried hand expressing before around 10 mins after feeding but only got measly few drops and only able to collect 30ml after 2 days. However, if I wait longer before start expressing, will it reduce the amount of milk for the next feeding? Should I wait until DS sleeps longer before start building the stock? Or should I use manual/electric pump to get better output?