Hello
welcome to health care magic
I have gone through your question very diligently and i really appreciate your concern.
Low back pain, painful sex, burning urine with history of renal stone might be related to number of conditions like
PID (
pelvic inflammatory disease)
Kidney infection (
pyelonephritis)
Urinary tract infection
Joint disorder
I see patients with similar complaints and history in my clinic routinely, I would advise them for a battery of tests like blood for hemoglobin, CBC, Liver function test, kidney function test, urine culture and sensitivity test or an ultrasound if need be.
You may require a course of antibiotics under medical supervision.
Meanwhile maintain good hygiene, have plenty of fluids
Multivitamin and minerals supplements will definitely help you
Hope I could answer your question, please feel free to ask for further assistance, I will.be happy to help you.
Best wishes