Thanks for posting your query.
Although your EKG is normal, still you should consult with internal medicine specialist/ cardiologist and should go for coronary angiography
& 2 D Echo for better clarification of heart status.
You should also go for ultrasound
imaging and renal function test for kidney status.
If you have acidic belching
and gastric problems then you should also go for endoscopy
If all investigations are normal then you should take muscle relaxants for relief of symptoms.
Aggravation of pain with bending and turning suggests involvement of muscles.
Dr. Mayank Bhargava