From the investigations you have mentioned, nothing seems alarming.
You have not mentioned whether you get any other symptoms/what treatment you'd so far and how long has the lymph node been enlarged?
If the Lymph nodes are significantly enlarged and you want to rule out lymphoma
, the next 100% confirmatory test would be FNAC (some fluid is aspirated from lymph node and examined under microscope) or excision biopsy
(remove lymph node and get it checked over by pathologist).