Had bad flu 2 weeks ago & yesterday i noticed enlarged nodes on both sides of neck. this morning much smaller and not visible, but i still feel it

Enlarged lymph nodes: Lymph nodes enlarge on the neck often in response to upper respiratory tract infections. Knowing that the size reduced, consistent with a resolution an infection, is not usually concerning. Lymph nodes are the location where the immune system mobilize and communicate to fight an infection. Like during a war, soldiers will huddle together to plan an attack.