Creatinine 3. 6. Has not come up normal?

My mom's health has been deteriorating month by month since we started the treatment to control her creatinine which was 1.6 in the month of August, she was only taking one medicine in the morning for her BP since last 7-8 years, but from last 3-4 months her BP is showing as 160-170, so we have consulted nephrologist 2.5 months back, he gave some medications, from last one month she is facing issues with the coughing, one of the doctor did give her 8-10 days antibiotics, we have got her KFT and urine test done last week and now her Creatinine has come like 3.6, GFR 12, urea 90, protein is also showing up along with blood in the urine as per report, bun creatine ratio is 12, RBC is 40-60, pus cell 18-20 Can someone please help and suggest if there is any urine infection because of which her report has not come up normal? We are clueless and have consulted so many doctors in the last 2 weeks but none of them have given us proper response and root cause.