I just want to reassure you as I have just finished this whole process! I'm thinking that the doctor was a bit too quick to say everything is fine during your colposcopy - if your smear showed high grade dyskaryosis, then that means you definitely need treatment (there are obviously cases where smears can give "false positive" results i.e. when the results say there are abnormalities when in fact there are none - but this is rare!). Pretty much everything I have read has said that if you have moderate or high grade dysk, treatment is inevitable.
In my case I think I had 3 or 4 biopsies and my initial smear was only moderate dyskaryosis. On viewing my cervix at the colposcopy, the doctor said that she categorised my abnormalities as "high grade". The wait for results is usually 4 - 6 weeks and I have to say, out of the whole treatment process, this was the worst time. I experienced very high levels of anxiety, sleepless nights and really easily, breaking down into tears. I was just really worried about the biopsy showing up something worse. Having come on this forum a lot during that time, I can assure you that it is completely normal to feel like this! What I would say is that worrying yourself silly just like I did is pointless (though difficult to stop yourself from doing!) as it will not affect the results. Everything is out of your hands so it is best to try not to think about it (if you can - I know it's easier said than done!).
Also your doctor mentions "surgery" but this is most likely just going to be a LLETZ which is a really simple, quick procedure and you are treated as an outpatient. I was in and out in about 25 minutes and was able to run for the bus immediately after (this completely surprised my boyfriend, as he imagined he would have to virtually carry me home). I stressed out massively before the LLETZ, but I can honestly say, it was almost completely painless (just a little discomfort when the local anaesthetic was injected) but after that, I didn't feel a thing and couldn't believe it when the doctor said "all done" - it was so quick! I would recommend taking someone with you and booking at least the rest of the day off if you are at work/uni. Obviously everyone's experience and recovery is different, but I felt physically fine after the LLETZ, just a little delicate emotionally. Not too much bleeding after either.
I have come out of the other side, and I am now all clear - so try to stay positive. In all likelihood, in 6 months time, you will be in the same position. Most people only need 1 treatment.
Let me know if you have any questions! I hope everything goes well for you xx