Hello, Your glands swell on and off, you have muscle aches and are tired. You also have pain in the upper neck when you lay. Your symptoms are suggestive of fibromyalgia associated with gland disorder. Endocrine disease causes symptoms of fatigue and weakness. Get clinically examined by a GP, get all blood and urine tests done to check the hormone levels. Imaging tests may be done to help locate or pinpoint a nodule or tumor causing symptoms. Treatment of endocrine disorders is complicated, as a change in one hormone level can throw off another. Your treating specialist doctor may order routine blood work to check for problems and start treatment. Widespread neck muscle pain that you are experiencing indicates fibromyalgia in progress. Get clinically examined by a GP, get required blood tests and imaging tests done. Get treated at the earliest. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician