Welcome to the site.
Well, all your investigations except one that is GFR seem to be more or less on the normal side, slight increase in one or more of them does not amount to be serious.
However, coming back to reduced GFR in your case, which should be 90 or above to be normal for the kidney function, it has decreased by 8 since September so at 61, GFR does indicate that your kidney function is slightly impaired, therefore i suggest that you ask your treating doctor to refer you for either Ultrasonography or CT scan of abdomen ( whole), and see through this investigations, to what level is your kidney function has been impaired as this will be able to give a better picture.
Also, in addition to the above mentioned investigation, also get your Kidney function test done and urine routine microscopy done as these tests will assist the use or CT scale in clearing email picture about your kidney functioning.
The rest of the investigations that are slightly raised are of no significance, you shall concentrate on kidney tests discuss the same with your treating doctor.
I hope this helps.
Wish you all the best. As of now do not try to jump to hasty conclusion as the test values do not indicate serious condition, but the kidneys need to be looked at and assessed, so kindly do the needful.
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