when talking to my son 5 days ago i noticed a large lump on his neck and he said he noticed it too,it looks like an adams apple on the side of his neck!!! it very large like the size of a small egg!!i took him to the dr and the lump is a very swollen lymph node....dr gave him some antibiotics and blood work which hasnt come back yet. he showed no other signs of infection until tonight he is complaing of an awful sore throat and said he is a bit light headed...the lump seems to have gotten bigger since seeing the dr 4 days ago! he did check him over and seemed to have no answer yet, should i be concerned?