Pap smear with Ascus then cin 3 biopsy

I’m 34 and went for my pap with no symptoms or issues. It came back as ASCUS and high risk HPV. Because of my age I was advised I would need a biopsy which then came back as CIN3. I am seeing my gyno this week to talk next steps but I just wondered has anyone else experienced this? My previous pap was when I was 26 so I had waited a long time to do another one but I was shocked at the difference from pap to biopsy result and now (assuming I need to have the LEEP procedure) I am concerned I could be told things are even worse than CIN 3!