Contour plowing, Pennsylvania, 1938. Contour bunding, Catalonia, 2007. Contour ploughing or contour farming or Contour bunding is the farming practice of plowing and/or planting across a slope following its elevation contour lines.
1 recurring middle ear infections.  Fluid in the ear may be accompanied by signs and symptoms of allergies or an upper respiratory infection including congestion, runny nose, post nasal drip, or watery eyes.
Idea? Fluid in ear? Assuming that these symptoms have been present for less than a week, fluid in the left middle ear from the flight may be the cause and this may or may not resolve completely by itself after 2 weeks. It is possible also that you may have an ear infection. On the other hand, from your history, I can't rule out a migraine headache triggered by stress especially if you have a history of migraine.