Liza,
I know how you feel, both my DH and i are 26, we are young and have a healthy lifestyle, neither of us smoke, i am not drinking while TTC, DH is but in moderation. I just got my period today so am about to start our 4th month TTC. I have had 2 laser treatment procedures for CIN2 as the abnormalities came back and i can't help have this thought in the back of my mind when each month comes around again. They say it will not affect anything but i know it scars your cervix cause when i have a pap smear the doc says she can "see the scars from were the work was done!" If we are still trying after 6 months i am going to the doc's even just to ease my mind and literally demand they do some tests. I think if you are stressing about it go and ask some questions ( and tell them you have been actively TTC for the whole 9 months!). Hope everything works out, let us know how it goes.