I went reluctantly too docs as j had blood in my stool

husband made me go.. I had blood tests then on back of those had examinations then doc referred me for colonoscopy. Had that then person who did it said I had diviticular disease but also he took biopsy's.. 3 weeks later I had a call from hospital asking could I come for ct  scan.. no explanation 

rang  .. can't get too see or speak to gp but receptionist said gp said don't worry for now but when ct results are available they'll discuss all

im worried.. should I be ?? Or is this just a precautionary test?? After a colonoscopy ( same day ct scan call)