Hi Dear ,
Thanks for placing your query here.
I can appreciate your concerns.
with pus formation,high fever
& vomitings are serious enough features to see a doctor immediately.
It is clear doxycycline is not working. There is possibility of blood stream infection (septicemia
)developing & you need urgent appropriate antibiotics possibly in injection form.
Please do not sit over these serious complaints.
Hope I have answered your query.
Wish you speedy recovery.