Welcome in H.C.M.
I have gone through your query regarding small painful bumps on neck and similar painful spot under nipple along with sore throat
after analyzing your symptoms it appears as you are having acute pharyngitis
with cervical lymphadenitis
. Most of the times such sore throat are viral and your lesions below the nipple are also most likely viral or allergic.
To confirm the diagnosis and treatment you should do-
1- Culture and sensitivity of throat swab.
2- Blood- CBC, ESR, MP, Prothrombin time
, widal test
Till the investigation reports are awaited you may take-
a- Anti allergic like cetrizine.
b- Anti inflammatory & analgesic.
Need of antibiotic will be decided after culture and sensitivity report.
I hope this will help you.