Pain related queries. Should i consult?

Last year I feel pain in lower back(kidney) & upper back. Now, I feel pain in shoulder & head. I, also feel tightness of throat & chest pain. I consult four doctors in one year. They prescribes some tests which is urine routine, urine culture, ultrasound sonograpy whole abdomen, CT kuv, rheumatology profile-III, HLA B Profile including B-27(4D), 2D Echocardiography, Anti Neutrophil cytoplasmic Antibodies IF, Sugar, Thyroid, Creatinine serum, Lipid profile test. But nothing is found. But I suffering from these pain. Firstly when I go to doctor only for lower back pain he check my bp then I started bp tablet which is nabicard sm. But after that my problem is raising.is it nerve related pain or any other problem. Please suggest which doctor should I consult?