Hi,
Welcome to health care magic,
All these symptoms of stomach ache and anorexia could be due to
stomach upset.
Stomach upset is likely due to
gastroenteritis or
irritable bowel syndrome or
acute gastritis but here there is no need to worry as it can be cured by medications and diet.
Since you have already taken medications like pantoprazole and normetrogyl 400 mg and does not get relieved then you must need further evaluation.
So,you should go for routine blood tests and urine examination with ultrasound abdomen if not done previously and upper GI endoscopy to detect the exact underlying cause.
Meanwhile,you should continue to take antacids (pantoprazole) with antibiotic and symptomatic treatment.
For swollen eyelids and feeling drowsy you can take over the counter antihistamines like certizine 10 mg and energy drink as prescribed your family doctor.
Avoid oily,spicy and non-veg foods for at least 3 to 5 days and must not take alcohol.
You will feel better within few days of this medications.
Consult gastroenterologist who may advice you upper GI endoscopy and will give you further advice accordingly.
Regards,