I Have Recently Had A Chest Xray, Followed By A

I have recently had a chest xray, followed by a CT scan, and finally a PET scan. A 12 mm mass in one lung and an 11 mm in the other, and many, many single spots did not "light up" the PET scan, thus hopefully no cancer. Last week I had a lung biopsy, and a anxiously awaiting the results. I have been coughing on and off for about 11 months, the exact time period when I have had my kitten, now an adult cat. Could his dander be causing my lung problems? I can not find any similar cases on the internet. Can you help me???