Ok,,your really gonna have to trust me on this ok? Lots of people here will tell you to increase fluid intake,,not so,,in some instances. Lets go over this so that you understand.

First! You need to find out what your protein in your urine is. The kidneys filter wastes and if you have blood, and protein in your urine, but no stones,then there are tons of kidney diseases your looking at.

Ok........I had this in left side also, felt like either a lil guy with a knife stabbing my left kidney,,then like my kidney was contracting? I had blood and protein (these are signs of kidney disease), I was told iga nephropathy.......Disease..............Unt il yesterday........
Seems a new doc,,noticed my hearing loss and there is a kidney disease thats called alports disease that mimics lupus in lots of ways,,,way to diagnose it is.........Higher incidence in men (im a woman tho), hearing or eyesight loss/ kidney pain, protein, blood in urine..Elevated white blood cells, with lowered platelets.
What im tellin you here is ,,if you can get your protein level,,,,,your wbc white blood cell, platelet..........And you have any hearing loss or eyesight probs..Then alports needs ruled out.
If you have all of the above minus hearing and sight loss,,iga nephropathy needs to be ruled out.
Important: altho it affects both kidneys,,i , like you feel it in my left kidney........I will need dialysis and transplant........Eventually.
Keep me posted!!!!!!!!!!

Me (p.S. Ive studied so many, that as you find levels out...Let me know,,itll help me to help you)