I have these. What helped me was either stopping carbs (oats, bread) or having lots of protein with carbs. I noticed that on days where I stress my spine they are worse. I think it’s a combination of spine, vagus nerve and GI. The last few days I have been taking 1 tbsp charcoal, 1 tbsp coconut oil, 1 tbsp apple cider vinegar. This seems to help. I just sent my SIBO test off so eager to see the results. Likely the carbs are upsetting some serotonin producing bad bacterial overgrowth.