So I am breastfeeding however only one of my nipples are erect enough to where she can feed the other just won't pop out and it's been going well until now my nipple is sore and hurts, but I still feed her I have ordered my pump which will be in soon but it's hard being the only one to feed baby so my husband and I have decided to supplement until our pump comes in also my milk production is on and off some days she gets enough some days she doesn't this is my second child first time breastfeeding I am going to start drinking nothing but water and having healthy snacks her pediatrician said it was OK to supplement until I can get my milk supply up and tips on how to do so?

Oh i am only 1 week pp the one breast with the non erect nipple produces more milk than the other she doesn't like to Latch with a nipple shield.