Milk only comes in after the babys born and to.me that was more uncomtherbal then painful.. Also they were really really hard like someone stuffed a big rock in them... Colostrum doesnt hurt coming in you can get that during pregnancy... Sounds sorta like heart burn to me ide take a tumbs or drink a big glass of milk
Doesn't sound like heartburn at all, so that's out of the question lol. Not sure, never heard of that before.