I been diagnosed with an infection due to mastitis. i was put on penicillin twice a day for ten days with oxycodein for five days. i am still experiencing all the symptoms of the infection. what next?

Mastitis: The causative organism is not likely to be sensitive to penicillin. Without a culture it is difficult to predict accurately, but suspect this will be staph aureus, and possibly mrsa. Go back and see your doctor before an abscess forms. Good luck.

Reevaluate: It's possible you may have a deeper collection within the breast. You may need an ultrasound, or an alternative antibiotic. Not to cause alarm , but there's even a form of breast cancer which causes inflammation and can appear to be mastitis. You're very young so that's unlikely - i'm just thinking out loud. Follow up with your provider who prescribed your abx. Good luck.