Abdominal discomfort. The right doctor.

Please respond asap . My Lower left side of the stomach always feels heavy,sometimes I feel sharp pain ,lost 3kgs over 4months. A month ago at one night I vomited all of a sudden.was better in few days. Recently 3weeks ago,I did complete body check up @ chinmaya hospital Bangalore. All results were normal, A week ago suddenly I had severe loose motions ,nerves in left legs are also seen wide up and I'm feeling little strained in leg. Got blood ,urin n stool test done,all results were fine. Doctors gave medications and now motions are under control.but nerves in left leg are still seen wide up.But the discomfort is left side of my tummy still remains the same, Should I be worried about it, I visited general physician doctors so far ,but I'm still not feeling better with the stomach. Please help and guide me to the right doctor.