Infected root canals are a miserable business, a miserable business indeed. You can't concentrate on anything but the woe that is your mouth. Who cares if it is sunny, or the leaves are changing when it feels like your jaw is going to split in two. Things to be grateful for: dentists and antibiotics. I can't imagine living in a time without them. People in the day died from this kind of infections and here I am, happy as a clam getting back to the business of painting and other enjoyable past-times.
Here's a watercolour of my brother's tent in the Ponderosa pines. This was in Utah but at an elevation of about 9500 feet, so there were many pines and aspens and things looked all lovely and green. It was chilly at night but we had a crackling campfire to sit around.