The other causes could be crohn’s disease, diverticulitis, infection in kidney, constipation, and an abscess in rectus abdominis muscle or psoas muscle, periumbilical hernia that has got trapped resulting in small bowel obstruction or mesenteric ischemia, aortic aneurysm,
ovary involvement (it is possible you now have
on left side), ectopic pregnancy, or endometriosis. Do discuss this with your doctor.
Hope this helps. Take care!