First time mommy

Just had my baby three days ago and he was latching on just fine but then not even 24 hours later, he had a circumcision done and now won’t latch at all and I wanted to strictly breast feed but watching my baby suffer to eat broke my heart because he would try and get extremely frustrated and cry and squeal so I want to know since I’m trying to breast feed him as well, I’m supplementing with formula until my milk comes in. I’m just so stressed. Anyone?