Stomach pain since 4 weeks. Are perfect.

Initially wen it started I had a bit pain on my left side of stomach below rib cage only on a small portion and not entire left side and continuous burps.I went to MBBS doctor and she prescribed me pepterd capsule and antacid syrup saying it's gas issue. Even after taking the medicine I was not 100% fit so I took other tests like CBC, thyroid, Sonography an all for my satisfaction. All the reports were normal but still I felt uneasy on that small portion below rib cage felt like something is pulling and the pain sometimes transferred to pelvic region and sometimes I felt pain like pain in the stomach and on the back. I consulted other doctor and he gave me PAN-D and astriozyme even then no 100% relief. Now I have stopped taking any medicine m just having food without any spices and drinking 3-4 liters water.Still I am not fit so I am confused what is it or what should I do. The pain is not killing but feels like it is pulling my muscles, burning sensation.Stool and urine are perfect.