What Cause Painful Periods And Stomach Ache?

Hello, during the end of 2008 I started experiencing various symptoms. My left bottom abdomen would hurt as well as my right leg, the left side of my back would burn and a little ache in my right arm. Initially I assumed I was probably lactose because my bowel. Movement would change and I was very gasy and bloated. For the past two years I have thought I had IBS, ulcers, and various other problems. This year I started noticing that my pains would increase a few days before my periods. They would last until my period ended then they were not too painful. Last year I went to the e.r. because my abdomen was hurting too much. The doctors found ovarian cysts on my right ovary but nothing on my left side, which was where the pain came from. I also have very painful periods and three times now I have found blood after I urinate. Last month I had some spotting for a few days before my period came. With all this symptoms I am begining to think I have endometriosis sciatica. What do you think?