I, too, converted to a positive ppd about a year ago. I took the course of INH, and besides the wierd side effect of breast tenderness, had no problem. I kinda stressed about it at first, but now I figure I'm just covering all bases. I've also had a needlestick, back injury, assault, latex sensitivity (not true allergy thank god.. i just avoid latex), and a bout of scabies thanks to a "rash" of it in our er/clinic. The way I see it, I'm running out of things to happen to me as an ER nurse...lol
Anyway, I feel confident that the INH did it's job and that will be the end of it. Odds are, you will be fine, but I'll keep you in my thoughts just the same.