Hi welcome to Health care magic forum.
Thanks for calling H.C.M.Forum.
Pain in the upper right abdomen suggests stomach irritation
or peptic ulcer
. It is clear for you that you are getting pain after taking alcohol, So either you stop taking alcohol, or change the brand.
I adviseyou to consult a surgeon for diagnosis and treatment, You may need to have gastroscopy, besides other routine tests for confirmation. Some times ulcer may be irritated by the alcohol and cause pain.
I advise you to avoid spices, junk foods, and oily foods, besides alcohol. take more of water and fluids.
Wishing for a quick and complete recovery.