Hello Kaju,
Sorry to hear about your worry. First let's see what the result is. Maybe there is no reason to worry, maybe there is.
Mostly I deal with good news stories and the patients wander away.
Sadly a few patients do relapse and we have to look at retreatment. It's not a short story, and what needs to be done varies, but it is always possible to retreat, so even if you have relapsed the chances are you can be cured.
I have a lot of patients cured first time round, I have some that we cured second time round, and I have a handful where it was "3rd time lucky".
We try to live by the moto of the US Marine Corps...
No man left behind
Moderated for political correctness as either
No man, woman or child left behind
Somehow "no person left behind" does not have the same ring to it.