I use Fridababy Windis and they’re great. You can buy them from boots.
We had this very suddenly a few weeks ago, and we started giving him a tummy massage 3/4 times throughout the day to keep the gas moving as opposed to bubbling up throughout the day. It really helped!! Such a simple fix but made such a difference xx
Son is going through the same now. What solved it for us recently was the carrier. Have him “standing.” The gas will just flow out periodically because sometimes it is very trapped and if they cry hard, the tightening of abs will keep the bubbles where they are