Hello and welcome to HCM,
According to your history you have had recurrent episodes of ear infection
(for which you have had tubes inserted), adenoid enlargement and tonsillitis
Now, again you are having ear infections and sinusitis.
You need to consult an ENT specialist
for prescription of antibiotics.
A through examination of ear needs to be done.
Since, you are having recurrent ear infection, some structural abnormality of the eustachian tube is suspected. Structural abnormalities can lead to spreading of infection from throat to the midd;e ear.
The ear, throat, nasal cavity
and the paranasal sinuses
are connected so infection at one site can spread to the other site.
Thanks and take care.
Dr Shailja P Wahal