Hello and thanks for the query.
The typical reference ranges for serum creatine are 0.5 to 1.0 mg/dL (about 45-90 μmol/l) for women and 0.7 to 1.2 mg/dL (60-110 μmol/l) for men. While a baseline serum creatinine of 2.0 mg/dL (150 μmol/l) may indicate normal kidney function in a male body builder, a serum creatinine of 0.7 mg/dL (60 μmol/l) can indicate significant renal disease in a frail old woman. 
Your creatinine  levels are slightly high but it is difficult to comment upon it as you had acute renal failure 2 years back and you have not mentioned the cause of that acute renal failure.
Kidney failure occurs when the kidneys partly or completely lose their ability to filter water and waste from the blood.
The build up of toxic substances normally removed from the body by the kidneys can cause XXXXXXX health problems. 
Acute kidney failure (also referred to as renal failure) happens rapidly. 

Please supply following informations so that I may be able to help you better
What was the cause of your acute renal failure 2 years back?
Are you suffering from hypertension or diabetes?
Are you taking any medication?
Are you suffering from kidney stones?
Do you take excessive pain killers?
Is there any history of lupus or lymphoma or any cancer?
Do write about the medicines being taken now.

Waiting for your reply.
Thanks
Regards

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Hello
Analgesic use has been associated with two different forms of kidney damage: acute renal failure and a type of chronic kidney disease called analgesic nephropathy.
Acute kidney failure requires emergency dialysis to clean the blood. Kidney damage is frequently reversible, with normal kidney function returning after the emergency is over and the analgesic use is stopped.

A second form of kidney damage, called analgesic nephropathy, can result from taking painkillers every day for several years. Analgesic nephropathy is a chronic kidney disease that over years gradually leads to irreversible kidney failure and the permanent need for dialysis or a kidney transplant to restore kidney function. 

Your history suggests that probably you had acute renal failure and it got reversed.
Now goals for future.
Since you already had an insult to the kidney once and are having hypertension and diabetes,it becomes very important for you to be cautious.
Control your hypertension and diabetes meticulously.
Your BP should be below 120/80 mm of HG.
Keep a regular check of serum creatinine and microalbuminaria.
As you have borderline high creatinine,you should avoid nephrotoxic drugs.
Prompt control of protein and potassium diet,if Nephropathy develops.
If Nephropathy develops then oral anti diabetics are to be stopped and injection insulin to be started.
Get your eyes checked for diabetic retinopathy every year.
It will be better if you use ramipril instead of Lisinopril,for control of your BP,as ramipril helps more in avoiding progression to diabetic Nephropathy,but after consulting your treating doctor.
Also talk to your doctor to discontinue metformin,since your creatinine levels are little high.
I hope to have answered your query however you may revert to me for any further query.
Thanks and best of luck.

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