My mom is 65 and she's been dealing with a really bad cough for the past two months. We got an x-ray done, and the doctor said we need to do a CT scan. They found a nodule about 6.7mm by 6.2mm in the upper lobe of her right lung. It's non-calcified, and I'm really worried. Does this mean there's a high chance it could be cancer, or could it be something like bronchitis or pneumonia instead?