Pain with swallowing could most probably be due to tonsillitis and a throat
infection. Throat pain
, difficulty swallowing, fever, scratchiness in the throat
, post nasal drip, malaise and loss of appetite are symptoms of tonsillitis. The swelling under the chin could most probably be a lymph node due to the throat infection. The swelling under the tongue could also be due to a mucocele or a salivary gland enlargement.