It is unclear if this is related to thyroid or not. It may be worthwhile seeing an ENT specialist for a physical exam and then guide any x-ray images that might be helpful.
Have your gp send you to a good endocrinologist in your area. You may have a goiter that needs attention. I have had Graves Disease for 10 years and have been put on Methimazole (tapazole) to help regulate it. Symptoms I had where: rapid weight loss, hand tremors (due to fast heart rate), right eye buldging and light images in my right eye (looks like piece of hair floating around).
Tests to run are: tsh, t3, and t4 blood tests and urinalysis. Your gp can run these but they do not specialize in the endocrin system.