You can watch and wait but do not be shy about going to your doctor if you start to go downhill. The descent can be fast, and the climb out of the hole can be painful, steep, and months long. Try to nip anything that is happening in the bud. I have learned the hard way not to be a hero or afraid to look like a hypochondriac. I find it helpful to monitor myself. I watch my pulse ox, and when exercising, I always have a heart rate monitor. With me, at least, bad numbers foretell a stretch of illness. My pulmonologist is not interested in my numbers so much, but if the numbers coincide with even a small change in how I feel, I know it is time to make an appointment.