I suffer from severe lower front & back pain but no one knows what it is. Can some one shed some light please?

I have suffered from lower left pain for some years now. I was told by my OBGYN that it was most likely due to scar tissue from my past C-sections. It is at it's worse just before & during my menstruation. Last summer the pain started getting worse. I developed and was treated for a kidney infection. Within 2 weeks after treatment the pain came back. I was given a CT scan. They found a lesion on large intestine & sent me for a colonoscopy. The colonoscopy showed acute diverticulitis but they were not convinced that was the cause of pain. I then had an ultrasound which showed everything was perfect but an IVP & a Renal ultrasound a month later showed an enlarged uterus a couple of insignificant cysts, follicle which they say may be residue from past kidney infection and an indentation in my bladder. I had a laparoscopy done 2 weeks ago & was sent home without anyone speaking to me so I don't know the results. I have been resting since surgery & was feeling ok until my menstruation started. The pain is a 10 on the scale & goes from the lower left front to the lower left backside and the joint of left hip. It does not move, is consistent, lasts for days & feels like it's swollen & on fire. Does any suffer from similar symptoms? Is it possible I am suffering from more than 1 problem? What other tests can I do? Is there some out there who recognize these symptoms? Please help.