I’d Like To Know What Other Diagnostic Possibilities I Have

Question : I’d like to know what other diagnostic possibilities I have for some recent issues/tests. I went to ER in XXXXXXX for chest pain and pain in my back on right side when I breathed. I had an X-ray that just suggested Emphysema, but because I had just driven for 9 hours straight the dr suspected a PE. I had a CT scan and also a D-dimer which didn’t suggest PE. There was a 2 cm mass on my right upper lung and perhaps inflammation in my lymph nodes. Diagnosed with pneumonia and went back on the road for the remaining 2 hours of my trip. Went to PCP when I got home. She did another CT about a month later. Node was a lil bigger though not significantly so. I was sent to a pulmonologist 2 days later, and a PET that week. PET indicated lung cancer with lymph node involvement. I had a biopsy that was negative. They didn’t biopsy the node bc it was in a dangerous spot. 2 weeks later biopsy of node and several lymph nodes at another facility. All negative. Both bronchoscope.
So now, we are scrounging for other possibilities. TB negative. HIV negative. 4 different funguses negative. And as for the pneumonia diagnosis, I only had the pain. No fever, recent illness, or coughing. CBC normal. ESR was normal and then was abnormal after 1st biopsy. ESR normal. One stain of biopsy showed nucleated red blood cells which so far seems to be the only abnormal thing.
Symptoms-extreme fatigue, appx 8 months. PCP said it was depression or fibromyalgia, still ongoing; drenching night sweats. Saw gynecologist. I’m not in menopausal age and all of my hormone levels came back just fine; shortness of breath, diagnosed with Emphysema. Long time smoker. Intermittent chest pain. Last 3 EKGs suggest prior heart attack. Had EKG last year and year before that was normal.
So what else could be going on? Any other possibilities we’ve not yet considered and/or tested for? False positive PET-CT, fatigue, night sweats, chest pain.