No problems affecting pregnancy.
Mine did not hurt ONE bit and I'm a Big Baby :) And my pre cancerous cells were in a pretty developed stage so my procedure was not a light one. Never smelled burning, no smoke, etc. Eeegads! That would scare me!
My OB-Gyn is top notch (professor at Baylor so she actually trains all the Ob residents).
Here's what she did so that I did not feel the administration of any of the shots (for anesthesia)....she kept telling me to COUGH! She made me do it a bunch of times and I couldn't understand why. Well, while I was coughing, she was adminstering the anesthesia. I felt nothing! Ask your doctor.
Lastly, so that you never need to go through this again, hopefully you know the typical main reason why we need this procedure in the first place. It is usually due to HPV which is all I am going to say here. If you don't already know that, discuss with your doctor.
Good Luck.