I agree with Angela. Try not to worry too much. Your doctors seem to be on top of it, and keeping track of it. If, God forbid, it does worsen, at least it can be caught very early. I've read that sometimes it can take up to two years for it to finally go into remission (leave your system, however people like to put it). Unfortunately, I have heard of some cases where it can take longer.
It's frustrating, I know. I have Cin 1 myself. I just went for my last check up a week ago, and am biting at the bit for the results. Supposedly won't be for another week. It's been almost a year for me (haven't had a LEEP or anything). I have a feeling it's not gone, but I'm holding onto that sliver of hope.
At least take some comfort knowing you're coming in for regular check ups. That's the best way to face this down. Stay healthy and be strong.