What Causes Intermittent Symptoms Of Discomfort In The Lower Back, Upper And Lower Abdomen And Soreness In The Groin And Buttocks For Years?

Hello.... I ve had some symptoms that come & go for a few years... I have discomfort in my upper & lower abdomen, sometimes lower back and a soreness in my groin & buttocks... I ve been to the DR. I ve had an ultrasound, ct scan & colonoscopy, all came back fine.. I had blood work done a few months ago and that came back to e also.... Any suggestions? C