I would suggest you to take antibiotics (such as Augmentin, if you are not allergic to this), mucolytics (such as bromhexine or ambroxyl), saline nasal
drops - 10 minutes after instilling this nasal drops please do steam inhalations, pain relievers (such as Ibuprofen/diclofenac/acetaminophen) and drink plenty of warm water. Hope so, most of your problems will be solved.
Please do not worry; there are no symptoms of thyroid cancer.