The enlarged Cervical lymph node may be due to Infection of Bacteria.IT is called as Chronic lymphadenitis
It is relieved with a good Antibiotic like Cefpodoxime
and Anti inflammatory drug.
Any lesion in the Oral cavity,head and Neck can cause enlarged Cervical lymphonodes.
As most of the diseases are excluded by Biopsy,it can only be due to Bacterial infection.
It will be subsided if proper Antibiotic is taken.
There is no wrong in taking second opinion
You can come back again after taking the above drugs.
Wish you good health and speedy recovery