well pus is always a bad sign, usually that's what any medical professional will tell you to look for in looking for an infection. there shouldn't be pus in any wound. All I can say is to keep trying to keep it clean and keep up with the anti-biotics. eventually it'll get better.
You need to continue to watch that the oozing doesn't get worse and that you don't have a fever. I had breast reduction surgery on March 26th, 2010. My incisions separated and I developed an infection. I was on a 20 day course of antibiotics. The infection is under control but I have to change the dressings three times a day. I am using a hydrogel, saline, and prescription strength Silvidene. I am noticing some improvement but the surgeon told me this will take months to heal. Good Luck. Keep following up with the surgeon or if necessary your PCP.