CREATININE, GFR, CHOLESTEROL, SGPT & GGT

I am 28 Years old and weight of approx 67kgs. I recently gone through the blood test, in which several parameters are found above abnormal as: 1. 25-OH Vit D : 9.12 ng/ml (deficiency) 2. Creatinine Serum : 1.23 mg/dl (Normal Range: 0.6 to 1.1) 3. EGFR : 79 ml/min/1.73m2 (Normal Range: >=90 BUN : 12.35 (Normal) BUN/Sr. Creatinine ratio : 10.04 (Normal) 4. GGT : 64.07 U/l (Normal Range : <55) 5. SGPT : 54.12 U/l (Normal Range : <45) 6. Total Cholesterol : 188 HDL : 25 LDL : 135 Triglycerides : 205 I have symptoms of sometime right side headache, frequent deep breath (done Echo & ECG on doc recommendations which was normal except written sinus tracycardiac on ECG) and gastric and acidity problem. Please suggest whom should I visit a physician, cardiologist or Nephrologist. Pls help... Pls note: I am not on any medication.