How long did it take from first symptoms to diagnosis?

Robert, it took me about 6 months from first symptoms to diagnosis. I had the same experience — they thought it was pneumonia first, then maybe COPD. It wasn't until a CT scan showed pleural thickening and fluid that they started suspecting mesothelioma. The biopsy confirmed it.

The waiting is the hardest part. Try to stay as informed as you can without going down the Google rabbit hole. And know that getting the biopsy done is the right move — it's the only way to get a definitive answer.