Could I have Celiac disease

Hello everyone, I am new to this forum. I am in desperate need of some support and guidance. For a few months I have had many health issues: prolapsed bladder, bacteria vaginitis, constipation with bouts of diarrhea and severe lower back pain. I have been to the ER 3 times, last time was Sunday with severe back pain that doesn't let up. They gave me morphine, then dialudid and finally Percocet before I was comfortable enough. They did an MRI, which they said looked okay. I had a colonoscopy yesterday. I was crying because of the back pain before I went in and woke up crying. The dr said my colon looked good! Now I have an endoscopy on Friday. I am just beyond frustrated and can't handle the pain anymore. Could it be Celiacs? Would that show up on a MRI? Blood work showed my thyroid was slightly low.