I have IBD, not from covid but associated with pre-existing celiac. Mine is collagenous colitis: it is diagnosed by microscopic analysis of colon biopsy samples. There are a number of other IBDs, such as Crohn's and ulcerative colitis. IBS is a bit like IBD, main difference is the physical evidence of disease as opposed to symptoms of. Hopefully he/she referred a gastroenterologist for you. From someone that collects autoimmune diseases, it is useful to keep a food log of what you eat and see if there is any commonality between that and your symptoms. Hard to avoid stress when our bodies are hurting, but escape is important.