I am very confused! Please help! I exclusively pump for my DS. I pump every 3 hour for 20 min or so. Each session, i can pump 6 oz (right breast) and 4 oz (left breast). I have a 2nd let-down at 15 min, then a 3rd letdown at 20 min. So, how do i know when to stop to balance out the foremilk/hindmilk? Do i stop at exactly 20 min? or do i let it drain after 20 min. I am afraid of i let it drain after 20 min, i am going to product MORE milk. I already have a stash in freezer already. Don't want to pour milk down drain anymore.