hello there!
you appear to have a
throat infection which involves now your lymph nodes. their tenerness(pain) confirms it. the fever and flu history with chills body aches.
vomiting headaches all are explained. well a month is too long.
have you tried any antibiotic for it?
start amoxicilline with some
aspirin gargles. care for the oraal hygiene.
mean while its better to take a swab for culture and sensitivity to confirm the pathogen responsible for this long treatment,.
consult a nearby ENT surgeon for better assessment and physical examination, some lab work up will be needed to see the infection status too.
but no worries ,, it will be fine. tender bumps( lymph nodes) are always infections easily resolved with medications.
all you need is an ent surgeon with opinion from infection disease specialist.
do the culture, start the anti biotics, some aspirin gargles and
oral hygiene and you will be fine sooner than possible
cheers