Welcome at HCM.
First thing is alcohal taken in abnormal high doses is always harmful whatever your condition is.
It harms more when you are already sick.
You must improve your hygiene of your food you take daily.
It is the feces oral root which is the main cause for colon
When you have IBS
than this Un hygiene causes more trouble.
You must also take a course of worms infestations.
Get well soon