Is there a solution to stomach pain from drinking?

I don’t have issues When I’m drinking but for the next couple days after my stomach wrenches. On google it says its from stomach acid and and I’m a big spitter, I get phlegm and have to spit whenever i eat food or drink water so I guess My stomach is sensitive. I don’t really get hangovers though but has anyone found a solution to this? I don’t know if I’m willing to tolerate the pain of that anymore. I tried an anti acid and I don’t think it did anything. It’s like an occasional throbbing and pushing on my left side.