Breastfeeding question

Jay

So i have been breastfeeding for a week now and baby latches on fine seems to be eating and falling asleep while on the breast after a goo 20 minutes. But when i pump between feedings i only get half oz from each breast 30 minutes on the pump. My baby is 3 weeks old now i was pumping as much as i could before until her lip tie was corrected because she couldn’t latch and i was pumping the same about an Oz sometimes 2 oz from both breast together but not much. Doc told me it will get better and milk will come in once baby starts to latch on every 2-3 hrs but is been a week and i don’t think it has happened i still need to supplement with formula because she’s hungry.

I have been drinking 5 cups of mothers milk tea a day nd the milk maker cookies.