Pneumonia and spot on lung

Hello everyone. About 1 1/2 months ago I had strep throat, was told he did not hear any pneumonia but wanted me to get xray, saying the antibiotic would take care of pneumonia if I did have it. I went for chest xray 3 days later, got a call from nurse saying my chest xray did not show pneumonia but they saw a spot at the base of my left lung and needed to see Doctor. I saw Dr. 3 days later, he said I needed to get a CT scan to see what it was. I got the ct scan, saw the Dr. 6 days later. The Dr. said I had pneumonia and the spot on lung, he said the only 100% way of knowing if it was cancerous was to get a biopsy which he didn't recommend at that time, Dr. said I had to have a follow up chest xray in 4 weeks to give the pneumonia time to clear up. The Dr. did tell me there was a small chance it could be cancerous. I am still feeling weak, tired, some chest pain/discomfort, also in my left lung, I am having trouble swallowing more so now, I also have shortness of breath that has increased, I am on 3 different inhalers, I have been a smoker for 30 years and also have COPD, I lost my dad to lung cancer in 2005, my Mother dies of cancer, have family history of cancer. I am going to see the Dr. on 12/01, and to get chest xray, I am getting anxious as the time comes closer. I just do not feel myself, no energy and above symptoms. Would a Dr. tell you there is a small chance it can be cancerous if he saw something on the ct scan report he is unsure of? Why would a Dr. tell you that? Any kind of input, help, advice would be greatly appreciated.

Thank you all for reading! Darzy