Good morning Lisa.....diagnosed with Stage 4 in February of this year. What a shocker....out of the blue!! It has been a real "roller coaster" since then, but doing my best to stay positive. Will have my next PET on May 9 to see if the Tagrisso is doing it's "magic".....keeping fingers crossed. If having side effects is a positive thing, then I am confident that it is working. My major complaint right now is shortness of breath and cough. I can handle the fatigue and occasional diarrhea. Other effects are minimal. So thrilled to hear that you are three years out.