My mother has cancer in the throat area that one doctor has said already metastasized in both lymph nodes? what course of action should we take?

Sounds like: Oropharynx (base of tongue, tonsil, hypopharynx, supraglottic larynx as primary, there are chains of nodes on both sides of the neck, the more & the bigger involved, the less favorable. Hx: smoking/alcohol: if not hpv genome check in tumor. Standard: chemo/rt. Some prefer chemo first, then chem/rt with neck dissection to follow, especially for residual nodes.