Baby won’t latch! 😪

NLM

We are at 8 days pp. He latched well the first couple days, then my supply wasn’t meeting his demand so we had to supplement and now can’t get him to latch at all and it just makes me cry. I don’t want to use formula yet, but no choice, lots of tummy aches and gas now. 😩I pump every time he would feed....any advice is appreciated! I met with lactation. It’s just a supply/demand issue.