Unfortunately, the full text of the MedPage Today article titled "Blood Clots After Colonoscopy; Antibiotics and IBS Risk; Can Vitamin D Calm IBD?" was not found in the search results provided. The available results contain only fragments from Slovak and Czech medical sources that relate to other topics (hypertension, cancer, reproductive health), but not the specific article that you asked to summarize. I would need the full text of the original article to create an accurate and factual summary as per your requirements. Without it, I could not guarantee the accuracy of the information and comply with your request to present only verified facts from the article.