If you are sure that you did not have any unprotected sex or you are pregnant then no need to worry .
Tour symptoms of frequent urination
and pain in back can be due to urinary tract infection
. For that get a urine routine done , if it is positive they will prescribe you with a course of antibiotics with which your symptoms should disappear. Your other complaints like sticky vaginal discharge
can occur normally during estrogenic period of your menstrual cycle. It would have been helpful if you have mentioned your last menstrual date .
Hope my advice's will help you .