I must appreciate that you under the supervision of your Nephrologist
are taking care of your kidneys.
The symptoms you have described suggest an 'Over Active Bladder' which can be taken care of by Tab Oxybutynin
2.5mg OD.You may also start Tab Sodabicarb(500mg) 1 tab OD
You GFR is slightly reduced but can be maintained by taking care & avoiding NSAIDS & other nephrotoxic drugs & diet items.
All the best