If your throat and sinus infections are caused by a virus, the antibiotics will not help. Antibiotics
will only be useful if the infection
is caused by bacteria. As your throat
is persistently unwell, it may well be that you have a problem with the tonsils.
Another home help remedy to help ease sore and painful throats is to gargle with salty water. Just dissolve some salt into a cup of water, gargle and spit it out.
Ask your parent to book you in to see your doctor.