Hi dear, Be relax and no need to worry. These seems like normal hormonal changes affecting the breast at this age.. Read the following details that will help you more... Breast infections may cause pain, redness, and warmth of the breast along with the following symptoms: Tenderness and swelling Body aches Fatigue Breast engorgement Fever and chills Abscess If you have any of this then you must see a doctor,You can try the following to help your breast infection heal. Pain medication: Take ibuprofen for pain. Your doctor may prescribe a prescription strength pain reliever if your pain is severe and not relieved with over-the-counter medication. In mild cases of infection, antibiotics can be taken Pain relief: Warm compresses may ease pain. Try applying a warm, wet wash cloth to the infected area for 15 minutes, four times a day. If heat is ineffective,try the ice packs Drink plenty of water -- at least 10 glasses a day. Eat well-balanced meals Hope this will help.thanks