Immediately see a physician. You need to be investigated for cause of lymph nodes (glands) enlargementby firstly, through a complete blood count
and liver function test. The adenitis
might itself be compressing in neck giving numbness
to arms. Also an ray chest PA view to see if mediastinal(Internal nodes) are also swollen or not in which case a node FNAC( Biopsy) may be needed.
In meantime your Doc.should be prescribing Anti-pyretics and pain killers and antibiotics.
It is a short duration illness ,chances are you have some viral cause. but do see a PHYSIcian soon