Hi
Thanks for your query.
I appreciate your concern.
Your grand daughter is having
tonsillitis and
tachycardia is due to
fever .
Relax,continue with medication prescribed by your doctor.
Give her
acetaminophen every 6 hourly till fever is more than 100F,
Give her plenty of fluids ,lukewarm water will be soothing for throat.
Give simple bland diet to maintain proper nutrition,
Your child will be fine in few days,
God bless,