I think the level of CIN can only be diagnosed from the LLETZ, a smear only shows high, borderline or mild changes, I might be wrong so anyone can feel free to correct me.
My personal experience was that I had high grade changes with HPV. After LLETZ I was diagnosed as CIN3 but it was all removed, I also have high risk HPV, which I only saw on my paperwork at the colp appointment.
I went for treatment at my appointment rather than leave it, I just wanted it gone. My results took about 5 1/2 weeks to come through, it was the worst bit waiting, checking the post every day, but I found this forum really helped. My partner is very understanding but when I didn't want to burden him, or keep him up before work the next day, I came here and it really helped as there are so many people who've been through it, and all the symptoms are covered somewhere.
I was fine to go back to work the next day, I think it helped me actually being distracted, but I think I was lucky as I didn't really get any cramps or feel ill at all, until the infection after a week, and that didn't really make me feel that ill. I did get quite emotional though, I think my hormones were possibly, understandably, going a bit mental.
If you're worried, or just want information, just come on here and there will always be someone who you can talk to.