Struggling with bedtime

Savannah

My newborn is 3 weeks old, and frustratingly no matter what I try, I can’t get him to fall asleep. He refuses all pacifiers, prefers to soothe on the boob, but has bad acid reflux. We swaddle him and get the lights off, turn the sound machine on and we start rocking him while standing because the rocking chair just doesn’t work for him. We’ve managed once a few days ago to set him down while calm and awake and he fell asleep on his own, but so far, I’m unable to get him to fall asleep using the usual methods, my husband has been the only person to successfully put him to sleep. What can I try? This is our second kid so we aren’t new to this, but my first fell asleep so easily with every method.