Anyone ever have more than one CT scan?

I had to have a chest CT last year due to the fact that I started coughing blood. My family doctor warned me of the dangers of radiation exposure and told me that I should not have another unless the benefits highly outweighed the risk. Well I have been having abdominal pain for weeks now and nothing was found on an ultrasound so the walk in clinic I attended suggested a CT scan of the abdomen. Due to what my GP had told me I am very apprehensive to have another for the fear of developing cancer down the line! Just wondering if anyone else has had multiple CT scans and what your experience with it has been?