Should I Be Worried About Abdominal Pain And H Pylori Infection?

I have abdominal pain in my upper central abdomen (just below the breast bone) radiating to the right side. Ultrasound, blood tests (liver function, diabetes, CEA) and endoscopy were clear apart from h pylori infection. No evidence of gallstones or ulcers. At the time of the endoscopy I had no pain for about a month. But now, 5 days later the pain is back. The pain feels like a gnawing ache and lasts for about a week, then subsides, eventually goes away completely, and then a month or two later comes back. It's been like that since June this year. It's generally worse on an empty stomach and feels better when I lie down on my back. During the periods of pain I have some belching and burping. I am currently on antibiotics for h pylori (second day). I've read that sometimes h pylori is an incidental finding and not the cause. I am worried that it's something more serious... Are there any other tests I should be asking for?