Impetigo not going away?

Okay, so I know that this is nearly impossible to answer over the internet. I just wanted to hear some thoughts.

A little over a week ago I developed what my doctor told me was impetigo on my face in this small spot by my chin/mouth. Now, I am a perfectly healthy 18 year old female with good hygiene so I have no idea how that even happened. But apparently it’s caused by staph or strep bacteria. So my doctor prescribed bactroban for me and said if it didn’t look any better after a few days she would give me antibiotics. Well, I used the bactroban religiously (three times a day) on the thing. And it didn’t look any better after a few days, it actually looked worse.

So we called back the doctor and I was prescribed Augmentin to take for ten days. I’ve been taking it for five days so far and nothing is better at all…it actually looks worse! Do you think I should’ve seen improvement by now? To top it all off, it now doesn’t even look like impetigo…it looks like it’s deeper in my skin and is almost ulcer-like. It’s gross! Like, the center is this black-gray scab and it has raised red ridges around it. And it oozes pus, which is absolutely disgusting. I hate the fact that it’s on my face too, and now I’m worried it’s going to scar. Does this sound like impetigo still or…?

Thanks for your help. I understand if you can’t really help because, like I said, this is only over the internet. But maybe someone had something similar?