2 days ebf and I feel like a failure.

I had a c-section overnight saturday and have been struggling with breast feeding. I have flat nipples which creates a bit of a problem. So after not getting a good latch they gave me a nipple shield. But baby didn't really seem to be getting enough colostrum and my nipples weren't expanding into the nipple shield. Do now the LC has me start pumping to evert my nipple, then put the shield on to nurse. Then I finish pumping and I feed her the remaining amount. (Was 1 ml). This worked ok during the day but I have pumped 5 to 6 times and only got anything to collect on 2 times. Both 1 ml.

I am scared my baby isn't getting enough, or any colostrum. And it is likely my milk will not come in for several more days. She gets fussy even after nursing, and I can tell she is hungry... I feel like I am failing her and if she could just be fed then she would be happier. My husband got frustrated when she was overly fussy, and said I needed to have the colostrum ready for her since she is so hungry and fussy. I told him I was trying (!), as I was pumping, with nothing coming out.... he backtracked a little once he realized that it was hard and I was trying.

But when should I call it? When did other moms decide to switch to formula?