Hi, Thanks for writing in. Your symptoms might be due to anxiety and thyroid problems. However, it will help to do an ultrasound scan of thyroid to know if there is any sign of cancer in the swelling in your neck. Thyroid swellings can remain dormant for many years and suddenly might develop increase in size with appearance of cancer like features. Please get a scan done and any nodules or suspicious areas in the thyroid will be known. It is important to know that most patients with thyroid swelling will never have cancer. However since you are having a swelling, to be safe it is always better got get completely evaluated. Thyronorm must be taken for long duration till your thyroid hormone level is not balanced. This requires you to take the medication regularly and get tested for thyroid every 3 to 6 months. Please do not worry.