Will I be able to go to school while preparing for a colonoscopy?

I have a colonoscopy coming up, but I don’t have any information about the test yet as it was just booked today. I know that you have to prepare for it with laxatives and stuff but I’m a university student and it’ll be right in the middle of my exams. I really need the test done, but I’m afraid I’ll have to take a few days off… people are telling me I’ll need to live on my toilet for a bit.. is the preparation really as bad as it sounds?