Pap smear CIN 1 then biopsy CIN 3

I went in for a pap smear and got results of CIN 1. My doctor wanted to do a biopsy just to make sure everything was ok. The results came back CIN 3. So my doctor did another biopsy taking out the size of a dime. I'm now waiting for the results of the second biopsy and extremely scared. Has this happened to anyone else?