i have underactive thyroid,take 200mg daily og thyroxine,found lumps on left side of neck,and thyroid hurting,had ultra sound scan,they found 4 lumps on left side and two on the other,and they scanned my thyroid,results due thursday.but have burning sensation and a big swelling on left above collar bone.since having my scan and the stinging is so painful i have to take pain killers every day,could this be cancer????