Thanks for the query to H.C.M. Forum.
Recurrent sore throat
may be due to diminish in immunity.
The pain in the breast is just due to infection in throat.
When sore throat ( infection) . there develops headache and pain all over body.
Consult an E N T doctor for recurrent infection.
Sometimes due to allergy
there develops infection.
You may use hot saline gargles or gargles with an antiseptic solution as a home remedy.