Why am I experiencing loose motion, chest pain, and fever?

 A common cause of stomach pain may be appendicitis which is the swelling of the appendix that leads to discomfort. It could be shown in an ultrasound, but maybe not. Visit a doctor to be examined in detail and thereby the one who will advise you on the right treatment which is mainly prescription drugs or surgery to remove the appendicitis. Look for symptoms like worsening pain, fever, or vomiting, which could indicate a more serious issue. 

Esoprazole need to take before food.

Antacid need to take after food.

Rebamipide need to take after food.

As you have H pylori gastritis, therefore you need to take HP kit for at least 15 days.

Styptovit-E is often used in various medical conditions where there is excessive or prolonged bleeding, such as heavy menstrual bleeding, nosebleeds (epistaxis), bleeding gums, and certain bleeding disorders. So please consider taking tablets only if its prescribed by your doctor to you.

You are experiencing some stomach upset and feeling sluggish as well. If you have had a fever, cold, dry cough, or/and muscle aches for the last fortnight or more, this might indicate gastroenteritis (stomach flu) or other viral infections. Rest, take fluids only in plenty, and eat simple easily digestible meals. If the condition persists or becomes severe seek medical attention without delay.

After gastric bypass surgery, it is necessary to monitor the condition of your sister. She might develop complications like malnutrition, dumping syndrome and hernias. It is advisable to see a gastroenterologist who practices bariatric surgery for regular appointments and tips on healthy living.