Hi welcome to health care magic... Here according to history you can have viral flu or there might be ebstein Barr infection... Investigate with... -Auscultation -CBC -Chest x ray only if needed Symptomatic management needed initially with more water and fruit juices more... Avoid excess spicy foods and fried foods... Vitamin c lozenges can be given... You have mostly reactive lymph node enlargement... For congestion relief phenylnephrine like antihistaminic drug given.... Take care If needed FNAC from enlarged lymph node taken to do further work up... Advise :Consult physician for examination and further work up