Excellent news! I'm glad the lab report came back negative, and I'm glad you're going to a get another opinion. No matter what happens, please, please, please do not go back to that doctor! Since most cases of CIN I clear up on their own, he should not be talking about conology. He seems much too eager to do that to you. If you had CIN I in the endocervical canal, I could see the justification of that because a cone biopsy would rule out the possibility of invasive cancer. But he should not be trusted.
Can the clinic you are going to give you a referral to another doctor, after you see them?