Should I go back to doctor?

Bl

Cesarean incision starting to smell. A few days ago I had a small pink bubble (the size of a pencil eraser) that appeared and went to the dr. He prescribed me saline solution to wipe it with and also antibiotics. Overnight it started to smell where the pink bubble is. Could this be the infection oozing out? Or are things getting worse and I should see dr again? Still have 4 days left on antibiotics.