I drank wine a few days ago and since then my stomach is hurting. Which medicine would be best for this type of pain - Zantac or omeprazole?
I'm sorry, but this is a Migraine site, and your question is beyond the realm of our expertise, other than to say that you should speak with your personal doctor who knows your personal history and can examine you to find the problem.
P.S. I did find these links that might be useful:
5 Drinks to Avoid with Acid Reflux
Heartburn Trigger Foods
7 Symptoms of Acid Reflux