I did get a weird feeling in winter 2020/21 which wasn't exactly acid reflux but there was something going on with my lower esophageal sphincter which bugged me sometimes. Then it stopped! I haven't had it since. My symptoms seem centered mostly in the lower gut, and I get distension and an awful feeling of fullness mainly on the left side low down. Plus I can get trapped wind pains at times. I have IBS -d.
Flare ups last usually a couple of days for me in their very worst state, but I can get milder ones which can last for more than a week. I have one of those now. Loose stools every morning (though usually only 1 toilet visit), lower tummy discomfort and distension 4 hours after dinner which usually eases up an hour or so later.
But trapped wind can really hurt. Have you tried anything like Buscopan? Peppermint ? Tummy massage, or a hot water bottle?