Anti-biotics are not always effective.
There are strains of bacteria that are resistant to anti-biotics. IF your anti-biotic does not seem to be doing the trick, then you need to get a broader spectrum anti-biotic.
You may even need to be in a hospital for a time under I.V. anti-biotic therapy.
Remember, oral anti-biotics are the least efficient, intramuscularly injected anti-biotics are better, much better, but the only thing that may save your life should you develop sepsis or [shudder] GANGRENE, is I.V. anti-biotics. Sepsis can destroy internal organs, cause pericarditis and heart vegitations, that is IF you survive it.
If you drain from your incision, feel weak and tired, run a temperature, have sweats that come and go or smell bad [down there] or any combination of the above, get thyself to an E.R. and tell them the TRUTH!
GET HELP.
The life that they save, may be yours...