Breast feeding

I’m a frm and have been exclusively breastfeeding my baby since he was born 2 days ago. I have colostrum when I hand express though it it usually just a few drops on my nipple - just enough to get baby to latch. A lactation consultant told me that I wasn’t making enough milk and that I needed to formula feed and then has had me giving almost 30ml of formula.my doctor told me whatever my body was producing would be enough for baby but I’m worried now since doing the formula feed she will like having the extra food.

My question is how much colostrum does it take? I know my milk will come in in a few days but do I continue feeding him so much formula when a small bit of colostrum should do?? Is a few drops enough??