Help!! I’m really worried

So I got some pretty old alcohol, like 40% alcohol gin extra dry. I drank 2 flasks today and a little more. I never felt suuper drunk off of it even though I like never drink. I loaded up water throughout the day to help but now it’s hours later and my stomach is in pain Update: I’m taking y’alls advice and trying to take a tums and a chewable antacid to be safe