Staph cscetion wound

I'm 10weeks postpartum and have had a little sore on my scar, the drs and nurses werent concerned as it looked almost like friction from my ovterhang. I asked last week if they would swab it and although it's actually been gettin better with my husband cleaning and redressing it came back with staph. Should I be worried I've had it this long? They are giving me antibiotics tomoro, I've been redressing it with a plaster that has silver and also cleaning with salt water and drying asap and it definetly looks better...which is making me hope it's just a mild infection.