I am afraid an infection of the kidney mild not actually be classified as mild, and taking an anti biotic for 3 days might be insufficient. The kidney is a noble organ of the body. A specific diagnosis and appropriate treatment of kidney diseases is compelling. In proper contexts, a presumed kidney infection
should ideally be accompanied by a urine culture and sensitivity tests to decide on the appropriate anti biotic.
Persistence of symptoms as you describe might deserve a more invasive watch and maybe an abdominal ultrasound
. Kidney function tests could also be worth performing to ascertain actual level and function of the kidneys. Persistence of symptoms might warrant booking a visit with the nephrologist
for a proper evaluation. While waiting, complying with the antibiotic plan and drinking a lot of water could be helpful.
Hope this helps as I wish you the best,
Thanks and best regards,