I always have regular PAPs, didn't miss them. About 10 years ago, I had one "slightly abnormal". My Dr said it wasn't a big deal, nothing serious, come back in 6 months just in case. I did, and they were normal from that point on. I had an annual in August 2004 (screened normal), and got PG 4.5 months later with DS1. As part of my first appt, I received another PAP. This time, it came back as CIN III dysplasia, or also called Cancer Stage 0. How I went from normal to three levels of CIN dysplasia was never answered.
Anyway, my point is that it is possible for someone to have regular PAPs, completely on schedule, and things to get missed, obviously.
And FWIW, as a result, I had to have an extensive cone biopsy and full D&C. This resulted in an incompetent cervix and led to complications when I was PG with DS2. Those complications, compounded by the problem itself, led to a large part of the reason DH and I decided to not have any more children.
Re: A little late but, my exp with cervical cancer
That's my fear! I've had MANY abnormal PAP smears and the doctor always tells me to come back in 6 months, then when I go to get it repeated it's fine. I just had my annual gyn appt a few weeks ago and the doctor said not to worry about it since all my HPV tests come back negative. I'm pretty religious about making sure I get them done regularly, but I still worry a little every time.
Even my very first PAP smear as a teenager, before I was ever sexually active, was abnormal.