Hi,
Welcome to ehealthforum,
The symptoms that you describe could be suggestive of possibility of endometriosis, adenomyosis, uterine fibroids, pelvic adhesions, PID etc. The exact cause can be made out after careful evaluation (and investigations ad indicated by your examination findings) done by your gynecologist/obstetrician. Do not delay in visiting your gynecologist/obstetrician. These at times, cannot be picked up by the usual imaging techniques, and a laparoscopic examination done is helpful as the same session can be utilized to remove/excise the adhesions or endometrial implants/growths if visualized during the procedure. Take adequate rest. Drink plenty of water. Maintain healthy diet. Be in regular follow-up and monitoring of your treating gynecologist/obstetrician and report any unusual/abnormal/new symptoms immediately.
Take care.