Every time I pump I can only get about an ounce or nothing at all.The only time I can get maybe two once’s is if I pump while I nurse. I’ve tried to wait until I’m

Full to pump or just randomly through the day and I still get nothing. What am I doing wrong? It’s so discouraging. I know my supply is good because my daughter nurses fine and is gaining weight perfectly. She’s 5 months now and i just want to be able to give her a bottle with out having to pump for two days just to make one bottle.