Same for us … gaviscon and carobel both really disagreed with my little one so I’m just managing it with the same method as you… sitting upright as much as possible… I use a carry sling in the day and elevate his crib at nighttime. I hope it improves for you soon xx
My son had this and had reflux. He was a little slow to gain weight but otherwise was unaffected by it
I have the same, I took my baby to the GP & spoke to the midwife and was just told it’s reflux. They put him on infant gaviscon which made him sicker so we stopped and it’s slowly getting better!