So i woke up this morning and my left breast was a bit hard(ish) and tender.. so i went to the after hours clinic at the local hospital. seen a doctor. he "felt" my boobs.. was strange.. he said that it seems i have an infection in my breast. He gave me antibiotics and said if it doesnt go away once ive finished then to make an appt with a doctor davidson (he is a gyno) He said that the tenderness is to do with my period..

So my question is: How do you get an infection in your breast? The doctor didnt really explain to me. he said the antibiotics are abit strong for a 21 yr old..

TIA
P.s. thanks for listening