Pelvic pain can be caused by:
An infection or inflammation. Pelvic Inflammatory Disease (PID), where chronic inflammation grumbles on ­in the pelvis. An infection doesn't have to affect the reproductive organs to cause pelvic pain. Other causes of pelvic pain can include pelvic inflammatory disease (PID), vaginal infections , vaginitis , and sexually transmitted diseases (STDs). Silent chlamydia infection would resultin difficulty getting pregnant.

All of these require a visit to your healthcare provider who will take a medical history, and do a physical exam which may include diagnostic testing. See your doctor or go to your nearest STD clinic promptly for investigation and treatment.
Pelvic pain with heavy ­or abnormal bleeding. Women who have ovarian cysts may experience sharp pain if a cyst leaks fluid or bleeds a little, or more severe, sharp, and continuous pain when a large cyst twists.

Fuyan pill is a good option as an effective medication on female reproductive system. It is made from Chinese herbs without any side effects and drug resistance.