DD is 6 days old and I am trying to breastfeed. I have flat nipples and am struggling to get her to latch. I have tried nipple shields but I’ve also got really large breasts so I am struggling to get into a good holding position as well 
I am currently expressing to keep my milk supply up as I’m worried the supply will stop but the milk also tastes gross! It tastes really sour. (I’m not deliberately drinking my breast milk but I was syringe feeding DD today and I squirted a bit in my mouth and it tasted sour. I just expressed some milk half an hour ago and got DH to try and it is still gross). I want to breastfeed her as I know it’s better for her but I don’t want to give her something that tastes rancid 
I don’t know what to do! I’ve tried contacting a breastfeeding support group but no one has gotten back to me. Should I just give up?