Thanks for your query,based on the facts that you have posted it appears that you have infection of the nipples with mild Gynaecomastia
Do not worry this is very common at the age of adolescence and is due to hormonal
You need to take broad spectrum antibiotics like Cefotaxime
along with anti inflammatory medication like Diclofenac
twice daily .
Do not worry this will get resolved spontaneously without any treatment.