Drink recs for sensitive stomach

I’ve been of legal drinking age for a long time, and I just recently starting drinking surfside teas and they are awesome. However even the slight sweetness and vodka has been making my stomach hurt recently. Tequila used to be my go to but I typically don’t like it in mixed drinks, but it doesn’t upset my stomach at all. Any recs for tequila mixed drinks that aren’t super sweet but also don’t taste gross?