Hi Miki,
It is possible that sometimes we imagine and feel a symptom because of hearing something related to it. As many have already said, for the most part it will pass if it is related to the anxiety.
Also there are lymph nodes along the back of the head, ears and down the neck. Lymph nodes will swell up as a defense mechanism if your body is fighting an infection in that area. They will also swell with other illnesses such as thyroid problems.
It was a good idea for you to get it checked out by your doctor.
Faryal, Health Educator