It sounds uncomfortable to have stomach pain after drinking milk. This could be due to lactose intolerance, where your body has difficulty digesting lactose, the sugar in milk, causing pain, bloating, or cramps.

• Try avoiding milk and dairy products for a day or two to see if symptoms improve.
• You might consider over-the-counter antispasmodic medications like those containing mebeverine, which can help relieve stomach cramps, but only use them after consulting a doctor.
• If the pain worsens, is severe, or is accompanied by other symptoms like vomiting, fever, or difficulty breathing, seek immediate medical attention.

I recommend consulting a gastroenterologist to evaluate your symptoms properly and confirm if lactose intolerance or another condition is causing your pain. They can guide you on appropriate tests and treatment.To narrow down potential causes, we will need some more information.I'm sorry to hear that you've been experiencing stomach pain since yesterday after drinking milk. Please tell me your age and gender.