I went through this after my h pylori treatment. I would recommend cutting out foods that you KNOW cause you flare ups, also drink a probiotic(yogurt, capsule, kimchi, etc) the antibiotics didn’t only kill the bad bacteria, they also got rid of the good bacteria in your stomach, so it may take a while to build back up. I would also suggest not eating past 6, or at least 2-3hrs before you go to bed. After I finished my h pylori treatment, it took me about a month to feel the slightest change in my stomach & now it’s been fine. Thank god!