I finally got a hospital grade pump that works a lot better than my Ameda. I am trying to pump after most BFing sessions now to drain my breasts & hopefully increase my supply. So far, I only get about 3/4 oz -1 oz out of both breasts combined in a 20 minute session. I know I don't have a great supply because we've had to supplement with formula, but I'm just wondering if this is a typical output after nursing?