If you experience oain in the lower left hand side around your hipbone a few days before your period is meant to start does this mean there is something else triggering the pain other than the beginning of your period? thanks

Pelvic pain: Pelvic pain is complex as there are several organs in the pelvis. The ovaries, fallopian tubes, uterus, cervix, bladder, appendix, intestines, colon and rectum can all be the source. Pelvic pain requires and examination to help organize the evaluation. Pain is a specific location before your period may indicate endometriosis. See an obgyn for evaluation