Soreness and Pain in Lower Right Back and Abdomen

Yes, it could be appendicitis. When I had it I thought it was a pulled muscle so I didn't go, in the end I had a hole in my appendix and I needed a more urgent and more dangerous operation. The doctors told me that if I had arrived earlier everything might have been more simple, but I was hospitalized for almost a week and had major surgery because of it. You shouldn't neglect it, you should go.