Breastfeeding and pumping help! Please

SC
My Lo is 3 weeks Monday. I've been breastfeeding and pumping but i sometimes think she isn't getting enough when I nurse. I keep her on until she pulls herself off, but it seem like she's fussy and wants more. I try to pump after every feeding but only produce one oz if that each breast. Is that normal? Is there another way to pump or a better time to produce more? My lo doc is also a lactation consultant and she said not to worry but being a FTM of course I'm worried. Any advice is welcomed. Thanks so much in advance. ❤️