thanks for your query.
History seems that you had an attack of tonsillitis
If your symptoms were resolved and just neck nodes are there, then it will take time to resolve the neck nodes.
As you are chronic smoker, neck nodes needs evaluation if no signs of relief in a week or two.
If so then better to go for fine needle aspiration cytology.
till then take any anti inflammatory drug like Tab Chymoral
forte twice a day.
Most imp. that avoid smoking
Many thanks, take care, bye.