My Dr says it will come back in the 3rd trimester until right before you're ready to deliver. When you can breathe again it means your baby has dropped and in the next few days toy will be in labor
I'm 27 weeks and that's been happening to me a lot now for about a week especially when I'm laying down after a meal
Completely normal! It's b.c everything is shifting and stretching and the baby is pushing on certain organs. It will go away for a little while before coming back at the very end. I had it from about 11 wks until 20ish