I had the "abnormal cells" letter in my twenties. I had to go back two more times for examinations and a "cell scraping" which was not pleasant. It was very stressful and I was going through a divorce at the time, so it was the last thing I needed.
The scrape showed that the cells were definitely not normal and then I had to go to the hospital for some kind of laser thing which was fucking terrifying. By this point I had already written my own eulogy, so convinced was I that I had full blown cancer.
The procedure worked. I had annual smears for 3 years after that and now I have a smear every 3 years. No further anomalies.
The system works. Be glad of the letter. Trust. ✌️
(I apologise in advance if this appears as a wall of text. My MN app has updated and it no longer respects my formatting)