your condition seems to be tonsillo pharyngitis
with cervical lymphnode enlargement. Since it is weather / season related it can have allergic etiology which gets infected. Get absolute eosinophil count
done and ENT check up of throat to rule out chronic tonsillitis
which undergoes acute exacerbation,In case of tonsillitis, chronic I would suggest tonsillectomy
with best wishes , speedy recovery & good health.