February 2015 My Son Was Diagnosed With Strep, And Flu.

February 2015 my son was diagnosed with strep, and flu. May 2015 strep again. This is when we first noticed two small swollen nodes on the back side of his neck (posterior cervical nodes), they never went away. August 2015, strep test came back negative, but treated him with antibiotics anyway and the sore throat and fever went away, lymph nodes remained the same size (about 1cm). Now we are in November , he had a sore throat a few weeks ago , no fever, and the lymph nodes have gotten a tiny bit bigger. Is this a cause of concern? They are moveable, and squishy. Can reoccurring strep, and viral infections cause those certain nodes to swell and not go down? He has also been snoring the past few weeks. Is this all related?