hi i am a 38 year old woman and am experiencing irregular bleeding between periods. This is the first time this has happened. It started about 1 week after my last period finished as very light spotting and another week after that this turned to heavy bleeding (like a normal period). Over the last 6 months or so I have experienced occasional sudden shooting pains on the right hand side between the lower abdomen and pelvis (feels like somewhere between the pelvis and rectum). Can you advise on what might be causing this? thank you