What is the best medicine if you have stomachache in the middle of night

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Last night in the middle of the night, around 2:00 A.M. in the morning, I suddenly have a stomachache, and I just ran to the bathroom. After it, I still felt the pain within, I try to look for the medicine cabinet, but I couldn't find none that treat stomachache. I don't want to wake up my mom, so I drink some warm milk. After an hour or so, I felt a little bit better and felt to sleep again. On the next day morning, I told the incident to my co - workers, some suggested me to cook butter milk or yogurt, and mix with garlic, it will kill the germ within my stomach. Would that work? Does anyone try that before?