Low supply mom

Hi, I had delivered my daughter since 2 months and I have trouble in breast feeding. My milk supply ever since delivered till now is 20-40ml add together for both boobs. I do pumping and my girl don’t latch at all. I have tried a lot of food and supplements but didn’t help at all. I have seen my gynae and not able to provide me any of the medication for breastfeeding. Have any mummies out there have the same issues as me? I’m so depressed.