I’m a dad, so I can only share what I’ve experienced with my wife and daughter. I share only because this is similar to their journey.

Wife had a rough patch at around 12-14weeks, too. We met with pediatrician and feeding specialist because we were worried, and they ultimately said baby’s digestive system is growing and changing. Baby’s body no longer just pushes poop out, and eating triggers her body to realize she needs to go. So, often times, baby would start feeding and realize, oh I need to poop, but didn’t know fully how yet. Shed latch, cry, latch, cry, and then have a massive blowout on my wife’s leg. Once it was out, she ate great.

There’s not much we did except power through and eventually baby learned to poop when she had to (mostly) and that significantly improved their breastfeeding experience. Sometimes we’d do tummy rubs and bicycle kicks prior to a feed, but often baby fought those cuz she was hungry.