You could be suffering from UTI or even pelvic inflammatory disease
. You should get a urine routine examination and a urine culture sensitivity done. If required get a usg of lower abdomen done. You may need a course of antibiotics. You can start with norflox
400 mgm twice a day which can be modified subsequently depending on the urine culture report. Drink plenty of water and maintain personal hygiene. If required consult a gynaecologist.