Intestinal pain after drinking even small amout of alcohol

Good morning all! Did anyone have the same problem: I get a persistent dull (but severe) pain in intestinal area after drinking even one sip of any alcohol. It lasts for 24 to 36 hours. I seem to have gotten it after giving birth 3 years ago. Had a colonoscopy & they found nothing. I understand that the obvious solution is to stop drinking all together but it is a small pleasure that i enjoy once in a while (one glass of wine with dinner at weekend and not even every weekend).
Did anyone go through this? Thanks a lot!!!