Some time after I had my second child, I got really bad about doctors. He's now 15. cough cough. I went as long as you between pap smears (maybe longer but I admit nothing . . .) and just had one this past December. I had all the same concerns you did. I don't know your age but I was told that things have changed. I got a cervical scraping which I will only have now every 3 years but a general pap smear still every year. I had not a single bad cell. They also checked for the dangerous kind of HPV that leads to cancer. Didn't have that either. Cervical cancer is not that common and very slow growing. Try not to worry. The odds are in your favor that all is fine. And any cancer that progresses to stage 4 almost always has symptoms. Do you have any?
The risk of cervical cancer depends mostly on your risk for HPV. Even if you have gotten HPV since your last pap smear, most HPV infections clear on their own within a couple of years, and don't go on to cervical cancer, and cervical cancers are slow growing.
I'm glad you're getting it done, and even an abnormal result probably won't mean you have stage 4 cancer, or cancer, for that matter. Good luck!