What diagnostic tests have you had? Radiation could be a concern if you had multiple high radiation tests but it would something to discuss with your doc.
The tests are often deemed necessary and there is a risk/benefit ratio since the illness has its own set of risks if not dxed.
If in the future, while determining diagnosis, you could ask for tests with no radiation, such as pill cam, MRE(magnetic resonance imaging) colonoscopy etc.
Sometimes the doc may feel a radiological test is needed. My son just had a ct because the MRE although great for bowels wouldn't be great for things outside the bowel, which is what he was looking for.