Infected incision

Balee • Pastry chef, wife, and mother of a beautiful 3 year old!
I had my c section 5 weeks ago. Today I noticed that about an inch of my scar is red, has some pus, and has a touch of blood. It's not that bad so I don't want to really call the doctor. I'm not exactly comfortable leaving it either though. Did anyone's Doctor suggest anything maybe over the counter? Can some simple antibiotic ointment do the trick?