Cin2 and CGIN

Hello, I received my letter today with my results from my loop excision that I had at my colonoscopy. I have Cin2 and CGIN. I'm just wondering if anyone can explain this to me properly? I got results through the letter and it's bank holiday weekend so I'll call up next Tuesday but I'd like some explanation before then?

What I can tell so far is cin is on the cervix while cgin is inside? Is that right? 

I have an appointment to have another loop excision to make sure they got all the abnormal cells. But how will they know?

I'm all so confused. I just thought the letter was just going to be be yes you have cancer or no you don't. Think I convinced myself that was the case anyway :(

 

But everything will be okay right?