about 3 days ago, I developed a very tender spot to the right of my windpipe, directly where you can feel the pulse. It came on suddenly, with no unusual activity or injury. It is painful to yawn, and feels difficult to cough (also have a lingering cough of unknown origin). When left alone, it subsides to a barely there discomfort, but yawning, coughing or trying to manipulate the area causes significant pain. thoughts?