Hi Clare, I found out I had high risk HPV & high grade CIN2 changes after going 5 years without a screening. Like you I went home & googled & scared myself stupid before my LLETZ, convincing myself that they would find cancer during the treatment as I had left it so long in between my smears. As it turned out they removed it all & there was no sign of cancer, I now have to go back in 6 months to make sure more abnormalities haven't developed.
If you have been told you have moderate changes I would take it to mean exactly that, you have moderate pre cancerous changes that are extremely treatable & will be removed long before they become cancerous. I know how hard it must be not to worry when you are dealing with cancer on a daily basis, you must be understandably terrified, but just keep drumming into your mind the facts - it takes about 10 years for cervical cancer to develop, & pre cancerous changes like your's are successfully dealt with in 95% of cases, the success rate is extremely high!
Now you have found this site, stick to it, you will get lots of information & advice from women who are dealing with this, & are having good outcomes - the stories you find online all tend to be worse case scenarios which in reality are thankfully quite rare.
I went into my LLETZ very scared & tense, which made it quite a long, painful & traumatising experience, & it definitely didn't need to be - usually they may be a little uncomfortable but should be painless. Try to go in calm & relaxed so it will be over as easily & quickly as possible.
I am sure you will be absolutely fine *hugs*, let us know how you go.