What Causes Bloating After Eating Food?

I had pain in my lower left side. Was constipated. After a week, I went to my PCP who thought it might be diverticulitis and prescribed cipro. Took it; it seemed to help for a couple days. Had diahrea. Then pain returned. Went on a liquid diet for a few days. Took Advil but that caused stomach pain. Went to chiropractor who thought the pain was injury-related, from lifting something too heavy. I had been very active getting ready for Thanksgiving. He treated my back and relived much of the pain, and I ll return to him. Bowel movements have returned to normal, but I feel very bloated after I eat. Should I be concerned or be pursuing other treatment?