Hi, dear I have gone through your question. I can understand your concern. You may have some upper respiratory tract infection with enlarged lymphnode. At your aga throat cancer is very rare. You have history of smoking but with this short history of smoking it will not cause cancer. You should take a course of antibiotics like azithromycin or amoxiclav. Don t worry about cancer. Just be relaxed. Consult your doctor and take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using health care magic. Wish you a very good health.