Hello ? I would like to ask how she gave birth already 13 days ago, no…

Hello ? I would like to ask how she gave birth already 13 days ago, noticed purulent discharge, went to gynecologist said that stitches are festering, uterus has not yet contracted, blood remains inside. During childbirth there were weak internal ruptures, prescribed a system for uterine contraction, said if they don't pass prescribe antibiotics Can antibiotics be given while breastfeeding the baby?