Stomach cancer is not common at your age.
However, with the symptoms, it is wise to investigate further - including an upper GI series and/or an upper endoscopy to rule out this possibility.
The negative ultrasound would make gallbladder or liver disease less likely.
The upper GI imaging studies are the most reasonable next step.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
kevinmd_
I know it is hard, but try not to increase your anxiety as it will only worsen the condition, including the two I mentioned above.
I had the same symptoms in my mid-30s and the same tests. It was a duodenal ulcer and some mild antral gastritis. I was worried it was stomach cancer also as my neighbor (age 54 at the time) had recently died of the disease.
Take a look at the National Cancer Institute's Web page for statistics on cancer incidence at different ages. It might be somewhat reassuring, but do follow up with your MD.