Thanks for posting your query.
Stomach pain after eating occurs in three conditions: cholecystitis
and peptic ulcer disease
With the available described symptoms there could be high possibility of peptic ulcer disease in stomach.
You should consult with internal medicine specialist/ gastroenterologist and should go for thorough check up.
You should also go for complete blood count
, ultrasound imaging, and serum electrolytes, blood sugar, serum amylase and thyroid profile.
You should also go for urea breathe test for H. pylori bacteria.
Meanwhile, you should take proton pump
inhibitors along with prokinetics for relief of your symptoms.
Avoid oily and spicy food, tomatoes, citrus fruits, excessive tea & coffee, chocolates.
There appears to be least possibility of pancreatic cancer.
Take soft diet along with yogurt.
Dr. Mayank Bhargava