It doesn't make sense to say your stool sample had a crp of 1009. Do you mean a fecal calprotectin level of 1009?
This doesn't sound like IBS to me. IBS doesn't make your crp or fecal calprotectin levels go up, nor does it lead to patchy inflammation in the sigmoid colon.
Have you had any recent infections? Do you take NSAIDs (like aspirin, ibuprofen, naproxen, etc)? Do you take any other medications?
Any other symptoms, like fevers, joint aches, fatigue, night sweats, skin problems, eye problems, etc?