I have a stomach ache

Of course, you shouldn't take painkillers every time you have pain. It is better to consult a doctor for advice.

Maybe the problem is in the digestion process? I also get a stomach ache if I eat too much or try some unusual food. I'm currently taking the dietary supplement Gundry MD Bio Complete 3 https://www.gundrymdbiocomplete3.com/reviews, which effectively helps improve digestion and also speed up metabolism. I think it's worth a try.