How Can Diverticulitis Be Treated?

I have diverticulitis, had 9 of the sigmoid colon removed years ago because of a cyst the size of a small grapefruit and had to have a colostomy for 3 mo while it healed. This weekend I attended a st. Patrick s Day dinner and within 3 hours I was doubled over with pain throughout my belly and it was sore , hard and I felt bloated. Bowels had not moved since Friday, the 16th. I had no fever but vomited 11 times, ending up vomiting bile. Tuesday morning at 4 a.m. the bowels broke loose and I ran all day and into the night. Could this have been food poisoning or does it sound like diverticulitis Thank you.