Swollen and painful lymph nodes 12 weeks after treatment

Hi all. I am 12 weeks post chemoradiation. Diagnosis: scc right tonsil hpv positive cancer with right side neck lymph nodes involvement. 

Brief history: i had 33 rads with chemo. Treatment ended on july 6th. Right tonsil was removed before xhemo and rads. Felt a significant shrinking in nodes in the first week of rads and chemo. Nodes shrank to 1 cm from almost 5 or 6cm. 

Issue: For last 5 days i am feeling a bit of tenderness in neck area where i had swollen nodes. It hurted upon toiching. Started pain killers, feeling that tenderness and pain has subsided but not completely gone. However, i also feel as if the nodes are swollen and enlarged and i can just feel them. Although the type of swelling doesnt feel like it was when cancer was diagnosed. Any suggestion, advice. Plz comment. I am worried. Thanks.