I have been suffering from lower abdomen and lower back pain on left side for more than 2 months. Sometimes pain radiates down the leg. I am not able to understand whether sciatica problem is causing abdominal pain. This month, I observed that just the day before my period, left abdominal pain was intense. I am worried if there is underlying problem as we plan to have kids. I met two gynecologists and had ultrasound of whole abdomen once. But everything was normal.