Welcome to the Norcardia club, population I'm not sure....
I grew Nocardia about 4-5 years ago and I think, I think it's finally gone. It's a PITA to get rid of. I first was on minocycline for about 2 years, stopped for a year, grew it again, and have been on Sulfameth for about a year. The CF clinic told me to stop taking it because my last culture came back negative but I don't trust them because it's really hard to get good samples from me (it requires a bronch).
Honestly it didn't seem to affect me at all. My PFT's didn't drop drastically besides the general "getting older" thing, I never got sick from it, and it just kind of sat there. I know of another lady that had Nocardia (not CF) and she got horrendously sick, like in a comma with every kind of tube sick, but it just depends I guess, like everything else out there.