My blood test in December 17 showed gfr 65 and creatinine 83. In Jan 18 gfr 62 and creatinine 87. I paid privately for a kidney scan and the doctor said both my kidneys are a good size and look healthy. My bp us low to normal and I'm not diabetic. My gp says there is absolutely nothing to worry about and that I don't have kidney disease. She also said no special diet needed, just watch salt, sugar and red meat. My gfr 5 years ago was 87. I have been taking omeprozole for about 14 years but have read they can cause damage to kidneys so have weaned myself off and for the last month only take levothyroxine for underactive thyroid. I'm having another blood test end of March. Should I be concerned?