Thanks for the additional information,
the vaginal discharge is indicating that you certainly do have an infection which can be not in the urinary tract but in the genital tract. This could cause the frequent urination as well. This is called as Pelvic Inflammtory Disease. This can be diagnosed by conducting a pelvic exam and a HIgh Vaginal Swab which will show any infecting organisms. The increased thrist can be due to dehydration as a result of the infection. Now this is usually treated with Antibiotics and Painkillers. But an exam and testing is necessary to amke the diagnosis. In addition an abdominal ultrasound will also be helpful.
Diabetes is certainly a possiblity specially since you have frequent urination and increased thirst. But an infection MUST be ruled out first as pains in the lower back and abdomen do not occur with diabetes but this is a possiblity as i said. This can be easily diagnosed by doing the following tests,
fasting blood glucose > 126 mg/dl will diagnose the disease
Urine analysis to look for glucose in urine
So i would suggest that you visit a doctor and not a nurse and get a pelvic examination and the following tests,
High Vaginal Swab
Repeate urine analysis and also check for glucose in urine
Fasting Blood Glucose
Abdominal and pelvic Ultrasound
Also if you have not had your period then a pregnancy test is also advisable as it would cause pains and increased urination sometimes but not always. A simple pregnancy tests at home will be helpful. i hope this answers your question but you should visit the doctor for a clinical examination and testing.
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