Cortisol Levels

My doctor had my cortisol levels tested she thought that it might be low and I might have a adreneal problem but the test results came back higher then the normal range, she didnt seem concerned and didnt really say anythng about it. Can anyone tell me what this might mean. Does the cortisol levels have to do with anxiety. What do these levels mean. Mine came back at 25.7 and the normal range listed is 4.0 - 22.0 for the am. Does high cortisol levels cause symptoms of any kind?