What Causes Pain And Cramping In Lower Abdomen?

My 16 year old daughter had bad pain/cramping in her lower abdomen both sides. She attempted to use the bathroom to no avail. Her discomfort subsided for several hours. Now she is laying on the couch and is complaining that her abdomen hurts again. When I was feeling and pushing on her abdomen, she said it was painful on the lower right abdomen area. From 1-10 pain scale she is at about a 2 and when I pushed on the area about a 3. She s telling me that the discomfort is like a band across her abdomen. I figured we would wait and see if the pain persists or increases and maybe tomorrow go to the doctor. Is that a safe plan?