Oh boy can I relate to this. Five years ago I was diagnosed with stage 4 metastasized melanoma in my lung. I went on immunotherapy Keytruda. I went into remission rather quickly but this severe shortness of breath is so severe I cannot function. My quality of life is next to nothing.
I cant walk 20 feet without feeling like it's my last breath. As soon as I sit I am as good as new. I cant do a simple task such as take a shower, make a bed, get dressed, load the dishwasher.
I have been to a heart doctor (keytruda damaged my heart) my lung doctor and oncologist. All their test come out normal.
I am at a loss.