If it is true bloat, you need to find an experienced rabbit vet to get to today. True bloat can be fatal within hours if it is the bloat that has blocked the stomach. It causes pressure to build up and this can compress the heart and lungs, causing dangerous complications. If it is intestinal bloat, that is usually from pathogenic bacteria causing gas build up in the intestines. It's different from stomach bloat, but it's an emergency as well, as it can be caused by the clostridium bacteria which releases harmful toxins causing enterotoxemia.
https://www.petplace.com/article/small-mammals/general/gastric-bloat-in-rabbits/
https://wabbitwiki.com/wiki/Acute_gastrointestinal_dilation
https://rabbit.org/vet-listings/
If it is minor to moderate gas pain from food and not an obstruction, that isn't as immediate of an emergency as true bloat. Gas pains can end up being critical if it continues and the rabbit stops eating for more than 24 hours, but often with or without giving baby gas drops, the pain subsides and the rabbit returns to normal within 12 hours.
https://rabbit.org/gastrointestinal-stasis-the-silent-killer-2/