stomach problem

i am suffering from stomach problems like acidity, heartburn, constipation, burps, stomach fullness, bloating, lack of appetite. doctors have done many test like blood test. stool test. sonography. endoscopy. colonoscopy. all test shown normal. doctor have prescribed me rabonik plus combination of rabiprazole 20 mg and levosulpiride 75 mg. i am taking this medicine from last more than 1 year. but now when i stop the medicine my symptoms appear same like before. other doctor has asked me to take just rabeprazole tablet. after taking this i dont feel acidity but i dont feel to eat anything anytime. should i cpntinue rabonik plus again.