I think I was around 22 or 23 weeks when I experienced a couple of weeks of pain in my left lung. It got so bad one night that I literally thought I was going to have to go to the hospital. I started doing some yoga and stretches to make more room around my lung area. I think the baby was just pressed so tight up against my lungs that it was paining them and maing it hard to breathe. I also kept an Ace bandage wrapped around my ribs for added support and slept propped up on tons of pillows for a few nights in a row. Luckily, I didn't experience it anymore after those weeks.